You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Jonathan Martinez. I want to cancel my recent reservation.Can you help me out?

ASSISTANT: Sure, give me a moment. Let me check your details.

USER: OK.

ASSISTANT: Sorry Jonathan, I did not find any flight regarding your details.

USER: OK,no problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your help?