You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Can you cancel my ticket which is reserved with my name Mark Clark?

ASSISTANT: Sure. Please hold on, I will check and get back to you.

USER: Ok.

ASSISTANT: Thank you for your patience, no reservation found on your name.

USER: Ok.

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

USER: Thank you.