You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this moment?

USER: I am Charles Robinson. Due to some problems my trip was cancelled so can you please cancel my flight ticket?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you for your response.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: Sorry to say that, there is no reservation found on your in our database.

USER: Oh! It's ok no problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your information.