You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, may I know your name for the cancellation process?

USER: Thank you for your response, my name is Edward Walker.

ASSISTANT: Sorry, as per your concern I can not cancel your reservation, as your reservation is not found as per our records.

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

ASSISTANT: Welcome, thank you for reaching us.