You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Andrew Baker.

ASSISTANT: How may I guide you Baker?

USER: I would like to travel to Seattle this weekend to meet my grandparents, so I want to book a ticket from Washington. Can you help me in booking?

ASSISTANT: Sure, I am here to help you. Please provide me your travelling dates.

USER: I am departing on 08/06 and return on 08/08.

ASSISTANT: Ok, what are the boarding and landing airport codes?

USER: My departure is from DCA airport and destination airport is SEA.

ASSISTANT: Ok, please give me a couple of seconds to check the flight.

USER: Sure.

ASSISTANT: There is a flight available from DCA to SEA, having a connection limit 1. Shall I proceed with booking?

USER: Please proceed for booking.

ASSISTANT: Ok, I have reserved your ticket with the flight number 1006.

USER: Thank you for your help.

ASSISTANT: You are welcome.