You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I best serve you today?

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 glad to assist you in that.

USER: Thank you.

ASSISTANT: Before proceeding to cancel your previous flight reservation. May I know your name?

USER: Myself Thomas Mitchell.

ASSISTANT: Sorry Thomas Mitchell, we have't found any previous flight reservation regarding your name in our airline database.

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

ASSISTANT: Thanks for reaching us.