You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my reservation due to some problems I am unable to travel those dates so can you please cancel my reservation?

ASSISTANT: Sure, please wait for a moment. Sorry, there is no reservation found on your name in our database to cancel.

USER: Ok.

ASSISTANT: May I know your good name please?

USER: Oh! It's ok no problem. Thank you for your information. Sure, my name is Catherine Walker.

ASSISTANT: You are welcome.