You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Katherine Carter.

ASSISTANT: How may i be of your service?

USER: Last week that I have promised my wife to take her for Private moon light DC city walk.So I need your help to make airline reservation.

ASSISTANT: Sure, please let me know where do you want to travel.

USER: My airport codes are from DFW to IAD.

ASSISTANT: Is there any connection preference?

USER: I need a connecting flight.

ASSISTANT: May I know your planned travelling dates?

USER: My journey dates are from 12/25 to 12/27.

ASSISTANT: Wait a moment.

USER: Sure.

ASSISTANT: We found an UA airline matching your specifications with the flight number-1013 and the fare 200.

USER: Ok, you can proceed for booking.

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thanks for opting us.