You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: Myself Jonathan Clark. For some issues I want to cancel my reservation, can you please help me?

ASSISTANT: Sure, I will help you with that. Please wait a moment. Sorry Clark, there is no reservation found under your name.

USER: Ok. It's ok. Thank you for the information.

ASSISTANT: My pleasure. Thank you for choosing us, have a great day.