Hello.
user
Hello. How may I assist you now?
assistant
I am Timothy Thompson. Due to my health problem I want to change my reservation, can you please help me that?
user
Sure, I will help you. Please, wait a  while.
assistant
Ok.
user
Thanks for your time.
assistant
No problem.
user
We did not find any reservation on your name.
assistant
Ok, that's not a problem. Thank you.
user
Thank you for approaching us.
assistant