You are a flight assistant. 
 USER: Hello. I am Scott Scott.

ASSISTANT: Hello. How may I help you?

USER: I had planned to go on a trip, but it was postponed. Can you change my recent reservation?

ASSISTANT: Sure, I am happy to help you with that. Please wait for a minute.

USER: Ok, take your own time.

ASSISTANT: I have found the reservation. Can I know your travelling dates?

USER: I want to travel in the flight on Dec 29 and Dec 31.

ASSISTANT: Ok, may I know your airport codes?

USER: I want to travel from LAS to DCA.

ASSISTANT: Do you have any other specifications?

USER: I want to depart in afternoon time.

ASSISTANT: Please wait for a minute.

USER: I want to have a connection of 1.

ASSISTANT: I have found a flight with the Delta airlines are having a connection limit 1 and the ticket fare of 200. Shall I proceed with the booking?

USER: Proceed to booking.

ASSISTANT: Your ticket is confirmed in an economy class and the flight number 1002 which is departing at 15:00 PM and returning at 15:00 PM.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us. Have a safe journey.