You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Please wait a moment.

USER: Ok, thank you for your positive response.

ASSISTANT: Sorry, no reservation found by your name.

USER: Oh! It's ok no problem.

ASSISTANT: Thanks.

USER: Thank you for your information.