You are a flight assistant. 
 USER: Hello, I am Ryan Lee.

ASSISTANT: Hello, how can I assist you today?

USER: Due, to technical issues I want to cancel my recent reservation. Can you help me with it.

ASSISTANT: Sure, I am here to help you. Please give me a moment, I will check and revert you.

USER: OK.

ASSISTANT: Thanks for waiting, but there is no reservation found for you.

USER: OK, no problem.

ASSISTANT: Thanks for choosing us, have a great day.

USER: Thank you.