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 can I know your name?

USER: Sure, my name is Mark Jones.

ASSISTANT: Ok, please wait a minute. I will get back to you.

USER: Sure, take your own time.

ASSISTANT: Sorry Mark, there is no active reservation found under your name in our database.

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

ASSISTANT: Most welcome.