Hello.
Hello, how exactly I can support you the best?
I met with an accident recently.  Owing to this situation, I have been advised to take a week's bed rest. I request you to change my reservation, so that I can take complete bed rest and recover at the earliest possible.
Sure, we are pleased to help you.
Thanks.
Can I have your full name, please?
My name is Lisa Davis.
Let me check the status of your reservation to change, just a moment.
Sure.
Thanks for your valuable time. Please apologize for the inconvenience, we have gone through the reservation list but could not find any reservation on your good name to change.
Thank you for your assistance.
It's my pleasure to help you. Thank you for availing us.