You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Rebecca Garcia, want to cancel my reservation as my trip is cancelled. Can you please help me?

ASSISTANT: Yes, please I will help you with the cancellation of flight ticket booking. Please wait for a moment.

USER: Thank you. Sure.

ASSISTANT: I have searched online but I could not find your flight reservation to cancel it.

USER: That's fine, thank you.

ASSISTANT: Thank you.