You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help 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?

USER: Thank you for your response, my name is Samuel Mitchell.

ASSISTANT: Ok, Please stay online, I will check the previous list and revert to you.

USER: Ok.

ASSISTANT: Thanks for remaining so positive. We are sorry to say that, there is no active reservation found on your name.

USER: Oh! It's ok, no problem.

ASSISTANT: Thanks for reaching us.

USER: Thank you for your information.