Hello.
user
Hello. How can I help you?
assistant
I am William Martin. I want to change my reservation, due to some health issue. Can you please help me out?
user
Sure, I will help you to change your reservation.
assistant
Thank you.
user
Please give me a moment.
assistant
Sure, I will wait for your information.
user
Sorry, no reservation found on your name to change your reservation.
assistant
That' ok, thank you for checking.
user
Welcome, have a nice day.
assistant