You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Catherine Mitchell.

ASSISTANT: How can I assist you?

USER: I would like to cancel my recent reservation, as my basketball match got postponed?

ASSISTANT: Ok, I will help you in that. Please, wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, I did not find any reservation on your name to cancel it.

USER: That's ok, thank you.

ASSISTANT: Thank you for contacting us.