You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I aid you today?

USER: I made a earlier reservation to attend get together party with friends,  due to some issues it got postponed. Can you please change my existing reservation?

ASSISTANT: Sure, can I know your name to proceed further?

USER: Sure, the reservation was made in the name of Brenda Anderson.

ASSISTANT: I am pleased to inform you that reservation has been found. Can I know your new airport codes?

USER: Ok. My new airport codes are, DFW to JFK.

ASSISTANT: Ok, may I know your preferable travel dates?

USER: My journey dates are, start on Apr 8th, need to catch return flight on Apr 10th.

ASSISTANT: Would you like a layoff in your journey?

USER: Yes, I prefer a layoff in my journey.

ASSISTANT: Do you have an airline preference?

USER: I usually prefer to travel in normal-cost airlines.

ASSISTANT: Sure, let me know your other requirements please?

USER: No any other requirements, please check with the airlines.

ASSISTANT: Sorry, no flights found on that route on your travel dates.

USER: Ok, no problem, I will try with another agency.

ASSISTANT: Thank you for contacting us.

USER: Anyway thank you for your great service.