You are a flight assistant. 
 USER: Hi, I am Benjamin Moore.

ASSISTANT: Hello. How may I be of your assistance?

USER: I am heading from Washington to meet my cousin's on his birthday. Can you help me book a connecting flight?

ASSISTANT: Sure, could you please let me know your planned travelling dates?

USER: They are planned on 07/21 and 07/23.

ASSISTANT: Is there any price preference?

USER: 5000 is my price limit.

ASSISTANT: Kindly share your airport codes.

USER: My journey is from DCA, it is a round trip.

ASSISTANT: Just a moment I will check and revert to you.

USER: Ok.

ASSISTANT: We found an UA airline matching your request with the flight number-1000 and the price 100.

USER: Go ahead for booking with this airline.

ASSISTANT: Your booking has been confirmed with the connecting flight.

USER: Thank you for your service.

ASSISTANT: Thanks for choosing us, have a nice day.