You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

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, could I have your name please?

USER: Sure, myself Robert Thomas.

ASSISTANT: Ok, please allow me a moment.

USER: Sure.

ASSISTANT: I have found your reservation and I cancelled it.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.