You are a flight assistant. 
 USER: Hello.

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

USER: I just want to cancel my recent reservation, due to my trip with my friends has been cancelled. Can you please help me with cancellation?

ASSISTANT: Sure, could I have your name please?

USER: Sure, Dennis Lopez is my name.

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: Ok, thanks for your information.

ASSISTANT: You are welcome, have a great day.