You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I hand help to you?

USER: I want to cancel my reservation, due to some problems I am not unable travel those dates, can you please cancel my reservation?

ASSISTANT: Sure, I am happy to help you. May  I know your name?

USER: Thanks. Sure, my name is Amanda King.

ASSISTANT: I am unable to found your previous ticket booking to cancel that one.

USER: Oh! May be I am not booked my ticket properly at that time.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for your information.

ASSISTANT: Most welcome.