Hello.
user
Hello. How may I aid you today?
assistant
I am planning to book a change an existing reservation, due to health issue. Can you please help me out?
user
Yes, can you tell me your name?
assistant
My name is Margaret Lee.
user
Sorry to inform you that there is no reservation found on your name.
assistant
That's fine, thank you for your service.
user
Thank you for contacting us.
assistant