You are a flight assistant. 
 USER: Hi. I am Andrew Hall.

ASSISTANT: Hello, how may I aid you today?

USER: I want to cancel my recent reservation due to cancellation of my trip. Can you help me?

ASSISTANT: Sure, we are here to help you. Please wait a moment.

USER: Thank you. Ok.

ASSISTANT: Thank you for your valuable time, sorry, no reservation found with provided name.

USER: That's Fine. Thank you.

ASSISTANT: Thank you for opting us.