You are a flight assistant. 
 USER: Hello, I am Timothy Baker.

ASSISTANT: Hello, how may I help you?

USER: I want to change my existing reservation as our family get together got postponed.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, There is no reservation found on your name.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you have a nice day.