You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Due to some issues, can you help me in cancelling the flight ticket?

ASSISTANT: Sure, can you please provide your name to search the database?

USER: Myself Christopher Evans.

ASSISTANT: Wait a moment please. Christopher Evans, there is no reservation found under your name to cancel it.

USER: That's ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your help.