You are a flight assistant. 
 USER: Hi. Jacob Garcia here.

ASSISTANT: How may I assist you today?

USER: Can you change my flight ticket reservation?

ASSISTANT: Sure, may I know your planned travel dates?

USER: The travel dates are from Dec 25 to Dec 27.

ASSISTANT: Thank you, may I know your airport codes?

USER: My airport codes are from DFW to JFK.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a single connecting flight.

ASSISTANT: Do you have any another specification on your journey?

USER: No.

ASSISTANT: United Airlines providing a flight with the price 200 with single connection. Can I proceed for the booking.

USER: I am fine with the airlines and fare. You can book it.

ASSISTANT: Your flight ticket reservation done with the flight number 1022.

USER: Thank you.

ASSISTANT: Welcome, thank you for reaching us.