You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Ronald Johnson. Can you help me to cancel my recent reservation? Because I have some work on that dates.

ASSISTANT: Sure, I am glad to help you. Please wait a moment I will check your reservation status.

USER: Sure, please check.

ASSISTANT: Sorry to say, no details were found regarding your reservation in my database.

USER: That is fine.

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

USER: Thank you for your time.