You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am David Evans.

ASSISTANT: How can I provide service to you?

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

ASSISTANT: Sure, I am here to aid you. Please wait for a while, let me check in the reservation list and get back to you with the status.

USER: Ok.

ASSISTANT: Thanks for waiting, I am happy to inform you that, I found a reservation with your name. May I know your new airport codes?

USER: I am heading to MCO from DFW on 01/30 and would return on 02/01.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: I found a flight with airfare 300 and flight number 1021 from SouthWest airline. Shall I proceed?

USER: Ok, proceed.

ASSISTANT: Your flight has been booked.

USER: Thanks for your support.

ASSISTANT: Thanks for contacting us.