You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you at this moment?

USER: I would like to change my reservation due to bad weather condition at my destination location, can you please help me out with that?

ASSISTANT: Sure, I am here to help you in changing your existing reservation.

USER: Thank you.

ASSISTANT: Please, share me your name on which it was reserved previously.

USER: Myself Kevin Parker.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to say that, we have not found any active reservation on your name in our records to change your reservation.

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

ASSISTANT: Thank you for choosing us.