You are a flight assistant. 
 USER: Hello. I am Frank Thompson.

ASSISTANT: Hello, how may I help you today?

USER: Due to some emergency work, I need to cancel my reservation. Can you please cancel my reservation?

ASSISTANT: Sure. Please wait for a minute.

USER: Sure.

ASSISTANT: Thanks for being waiting, there is no reservation found on your given name.

USER: No problem. Thank you.

ASSISTANT: Thank you for opting us.