You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: As my plan to go for a trip got postponed, I need your help in changing my reservation. Will you please help me?

ASSISTANT: Sure. May I know your name?

USER: I am Melissa Nelson.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there is a reservation found on your name. Please share your journey details.

USER: My travel dates are from 06/12 to 06/14. My source and destination codes are  DFW and ORD.

ASSISTANT: Thanks for waiting, there is a flight with airline: Frontier, flight number 1004, 1 connection, price 100.

USER: Please proceed with booking.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you.