You are a flight assistant. 
 USER: Hello.

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

USER: Due to some problems my trip was cancelled so can you please cancel my flight ticket?

ASSISTANT: Sure, could I have your name please?

USER: Thank you for your response, my name is Jerry Collins.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I want to cancel my flight ticket. Can you help me with that?

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

USER: Oh! It's ok, no problem. Thank you for your information.

ASSISTANT: You are welcome, have a great day.