You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help 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, please share your good name?

USER: Sure, myself Helen Wilson.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry, no reservation found on your given name.

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

ASSISTANT: Thank you for choosing us.