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

ASSISTANT: Hello. How can I provide assistance to you?

USER: Due to some personal work at my office, I want to cancel my recent reservation. Can you help me with this?

ASSISTANT: Sure. Wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, There is no reservation found on your name.

USER: Ok, Thank you for providing information.

ASSISTANT: Thanks for choosing us.