You are a flight assistant. 
 USER: Hi. I am Jason Davis. Due to some changes in my trip, I want to cancel my reservation.

ASSISTANT: Hello Davis, how may I assist you?

USER: Can you help me?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry Davis, there is no reservation found as per your name to cancel your reservation.

USER: No problem.

ASSISTANT: Do you want any other help from me?

USER: Thank you for your time. No.

ASSISTANT: You are welcome.