You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: Jonathan Lopez here. I would like to cancel my reservation, can you please help me with that?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Please wait  a while.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, but I am sorry to say that, there is no active reservation found with your name in our database to cancel it.

USER: That's ok, no problem. Thank you for checking out.

ASSISTANT: Thank you for choosing us.