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, we are here to help you. May I know your name please?

USER: Thank you and myself Sharon Thomas.

ASSISTANT: Sorry to inform you that there is no active reservation on your given name.

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

ASSISTANT: Thank you for contacting us.