You are a flight assistant. 
 USER: Hello. I am Samuel Evans.

ASSISTANT: Hello, how may I aid you?

USER: I need to cancel my reservation due to some personal issues.So can you help me with cancellation of my reservation?

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

USER: Sure.

ASSISTANT: Thanks for your time, there is no reservation found in your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.