You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to cancel my recent reservation which I have done last week because my trip got cancelled. Please help me out with that.

ASSISTANT: Sure. May I know your name?

USER: My name is Mark Carter.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thanks for being waiting,We didn't found any reservation by this name.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for picking us.