You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I would like to cancel my recent reservation because my trip dates are got postponed, can you help me?

ASSISTANT: Sure, we will be happy to serve you.

USER: Thank you.

ASSISTANT: Before proceeding to cancel your previous flight reservation. Can I know your name?

USER: I am Janet Campbell.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, we haven't found any previous reservation based on you name.

USER: That's ok, thank you for checking.

ASSISTANT: Thanks for reaching us.