You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rebecca Campbell.

ASSISTANT: How may I assist you at this moment Rebecca?

USER: I want to cancel my flight ticket, due to some problems I am unable to travel so can you please help me with that?

ASSISTANT: Sure, I am gleeful to help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment to check your previous reservation.

USER: Ok.

ASSISTANT: Sorry to inform you that, there is no reservation found on your name in our database.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for using our services, have a great day.