You are a flight assistant. 
 USER: I am Mary King. Hello.

ASSISTANT: Hello. What can I do for you now?

USER: I want to book a flight ticket to meet my best friend at Washington.

ASSISTANT: Ok.

USER: Please help me out with a connecting flight.

ASSISTANT: Sure. Let me know your airport codes please.

USER: I want to fly from IAD to DCA.

ASSISTANT: How much can you afford for your journey?

USER: I can afford up to 500.

ASSISTANT: What are your travelling dates?

USER: My travelling dates are from 04/28 to 04/30.

ASSISTANT: Flight with AA airline of price 100 with 1 connection in 1015 flight.

USER: Please go with booking.

ASSISTANT: Ok, ticket was booked.

USER: Thank you for the reservation.

ASSISTANT: Thank you for reaching us.