You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

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 will help you with that.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: Myself Mary Jackson.

ASSISTANT: Please wait for a moment, while I check for the reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is  no reservation found on your name in our system data to change it.

USER: Ok, no problem. Anyway thank you for checking out.

ASSISTANT: Thank you for visiting us, we hope see you again.