You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you for the day?

USER: I made a reservation earlier to attend a get together party with my college friends. Due to some issues in college it is postponed. So can you please help me in changing my reservation?

ASSISTANT: Sure, I am here to assist you. To change your reservation, I need to know your name?

USER: Sure, I am Margaret Walker.

ASSISTANT: Ok, please be on hold for a second.

USER: Ok.

ASSISTANT: Thanks for your time. We did not find any reservation with your name to change your existing reservation.

USER: Ok, no issues.

ASSISTANT: Thanks for approaching us, hope to serve you again.

USER: Thanks for your information.