Start with the confirmation email
Before opening a single app, search your inbox for the booking confirmation. Almost every major scheduling platform — Calendly, Acuity Scheduling, OpenTable, and most healthcare portals — embeds a direct Reschedule link in the confirmation email they send at the time of booking. Clicking it re-opens the scheduler with your booking pre-loaded and doesn't require a separate account login.
If the link is missing or expired, the platform's website or app is your next stop.
Platform-by-platform steps
Calendly (meetings, consultations, calls)
Open your confirmation email and click Reschedule in the email footer. You'll see the host's availability calendar and can pick a new slot. The host is notified automatically and you both receive updated calendar invites.
If you can't find the email, log in to calendly.com and find the event under your scheduled events list. Note: if the host has set a minimum notice period (common for 1:1 consultations), the Reschedule button disappears once you're inside that window.
Acuity Scheduling (salons, therapists, fitness, and more)
In your Acuity confirmation email, click Change/Cancel appointment. This loads your personal booking confirmation page. From there, click Reschedule, choose a new date on the calendar, and pick a time. Your appointment type and provider stay the same — only the time slot changes. You and the business both receive an updated confirmation.
OpenTable (restaurants)
Open your OpenTable confirmation email and click Modify. Alternatively, sign in to opentable.com, click your profile icon, then Upcoming Reservations, select the booking, and choose Change Reservation. You can adjust the date, time, and party size subject to availability. The restaurant's cancellation policy is shown before you confirm — many restaurants charge a no-show or late-cancel fee if you're within 24 hours of the sitting time.
Healthcare portals (doctor, specialist, physio, dental)
Most major US and Australian health networks use Epic MyChart or a similar portal (Medibank, HotDoc in Australia). Log in, go to Visits → Upcoming, click the appointment, and look for a Reschedule button. Some appointment types — procedures, imaging, new-patient visits — don't allow online rescheduling and require a phone call. If the button isn't there, call the provider's booking line; a 24–48 hour notice window is standard.
For UK NHS appointments, check the appointment letter — many trusts now include a link to NHS e-Referral or the trust's own booking portal. You can also call the number on the letter or use NHS.uk for primary-care appointments.
Know the cancellation window before you move it
The single most expensive mistake in rescheduling is moving a booking inside the provider's cancellation window without checking the policy first. Common windows:
| Service type | Typical no-change window | Potential fee | |---|---|---| | Restaurant | 24 hours before sitting | Deposit forfeited / no-show fee | | Fitness / yoga studio | 12–24 hours before class | $10–$20 late-cancel fee | | Medical / allied health | 24–48 hours before visit | $25–$75 no-show fee | | Hair salon / beauty | 24 hours | Deposit or partial charge |
Your confirmation email states the policy. The reschedule button itself may simply disappear once you're inside the window — that's not a bug, it's the policy enforced automatically.
When online rescheduling fails
Call the business directly. Even if the window has closed, a brief, honest explanation goes a long way — providers would often rather fill the slot with someone else than charge you. If you're disputing a no-show fee charged after an online reschedule, keep your confirmation email and any updated booking confirmation as proof.
You can also browse all task guides at /guides, or see how to request your medical records if your healthcare rescheduling relates to transferring records to a new provider.