You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Ronald Parker.

ASSISTANT: How can I serve you?

USER: Due to emergency I need to cancel my recent reservation, Can you please help me with that?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: Please wait a while.

USER: Sure.

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: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for approaching us.