You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am Mark Clark, I planned a trip to Washington DC to visit the National Mall with my family. Can you help me book a flight ticket?

ASSISTANT: Sure, I am glad to help you. Can you please provide when you are planning to travel?

USER: I planned to travel on 11/26 and return on 11/28.

ASSISTANT: Do you want to connecting flight or direct flight?

USER: I need a flight with one halt in between the journey.

ASSISTANT: Please help me with your codes of the airport, where you want to start and land.

USER: I will start my journey from Houston, TX-HOU and I like to land on airport DC-DCA.

ASSISTANT: Let me know your price limit.

USER: My budget for flight ticket is 1000.

ASSISTANT: Ok, please wait a moment I will check the availability of flights and revert you.

USER: Sure.

ASSISTANT: Thanks for waiting. We found a matching flight for you. Flight details are here, flight number is 1025 with single connection and price is 200. Shall I proceed to booking?

USER: It is perfect for me, please proceed with booking.

ASSISTANT: Booking your ticket has been confirmed with South west airlines.

USER: Thank you for helping me with booking.

ASSISTANT: Thank you for choosing us.