You are a flight assistant. 
 USER: Hello, I'am Rebecca Taylor.

ASSISTANT: Hello, how may I serve you?

USER: I just want to cancel my recent reservation, so can you help me with it?

ASSISTANT: Yes, I will help you. Please, give me a moment. I will revert you.

USER: Sure.

ASSISTANT: Sorry, there is no reservation on the name of Rebecca Taylor.

USER: Thank you for your information.

ASSISTANT: Thank you for choosing us.