You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I best serve you today?

USER: Due to post pone on my exam I need to change my reservation. Can you please change my reservation?

ASSISTANT: Sure, to proceed for change reservation may I know your good name?

USER: Eric Scott is my name.

ASSISTANT: Thanks for providing your name, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: Ok, not a problem.

ASSISTANT: Thanks for approaching us.

USER: Thank you for your information.

ASSISTANT: Wish you a great day.