You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name?

USER: I am Melissa Lopez.

ASSISTANT: Melissa, how can I guide you today?

USER: Help me to get a flight to Washington DC as I am going to visit Sculpture Garden. Can you find a flight on 06/28?

ASSISTANT: Sure, from which airport are you planning to catch your flight?

USER: I choose to land on airport DC-IAD and my source is Boston, MA-BOS.

ASSISTANT: Ok, have you planned any budget for this trip?

USER: Yes, my budget is 200.

ASSISTANT: Ok, do you need a return ticket too?

USER: Yes, I will return on 06/30.

ASSISTANT: Ok, do you want a halt in between your journey?

USER: I need a halt in between the journey.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Melissa, we found Delta airline is available on your dates with price 100. Shall I proceed with the booking?

USER: Sure.

ASSISTANT: Your booking has been done with flight number 1007.

USER: Thank you for helping me with booking.

ASSISTANT: Thank you for selecting us.