You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I am Catherine Roberts. Can you help me in cancelling my reservation, as my exam is postponed?

ASSISTANT: Sure, I can help you.

USER: Ok.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thanks for your time. We didn't found any reservation by this name.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.