You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve 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 to check further?

USER: Thank you for your response, my name is Timothy Nelson.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your given name in our portal to cancel it.

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

ASSISTANT: Thank you for reaching us.