You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, could you please tell us for what help you approached us?

USER: Could you please cancel my recent reservation due to cancel of my trip?

ASSISTANT: Ok, could I have your name please?

USER: My name is Steven Walker.

ASSISTANT: Ok, please allow me a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation with your name in our portal to cancel further.

USER: Not a problem, thanks for checking.

ASSISTANT: You are welcome, have a great day.