You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jeffrey Johnson.

ASSISTANT: How may I assist you today?

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

ASSISTANT: Sure, I can help you with changing your reservation.

USER: Ok.

ASSISTANT: Jeffrey Johnson, can you please provide your planned dates for this journey?

USER: I want to fly on 12/12 and 12/14.

ASSISTANT: Ok, may I know your airport codes also?

USER: I want to travel from BOS to DCA.

ASSISTANT: Ok, can you please give me a moment till I check with available flights.

USER: Ok, take your time.

ASSISTANT: Delta airlines is providing flight-1001 with 1 connection with the price of 300, may I proceed with booing?

USER: Proceed with booking.

ASSISTANT: Your ticket is confirmed, thank you for choosing us.

USER: Thank you for your help.

ASSISTANT: Have a safe journey.