You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you with today?

USER: I am Rebecca Thomas. Actually I planned a trip, unfortunately  the trip was canceled, can you help in cancel my reservation?

ASSISTANT: Sure, I can help you with that. Please allow me a moment to check the details for you. Rebecca, I have checked and see that there is no reservation found under your name.

USER: That's fine. Thank you.

ASSISTANT: You are welcome.