You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your good name?

USER: My name is Rebecca Jackson.

ASSISTANT: How can I help you today?

USER: I want to book a flight ticket with a price limit of 200 for attending a sports event in Washington.

ASSISTANT: Sure, may I know your journey dates?

USER: My departure day is 07/16, return day is 07/18.

ASSISTANT: Can you please provide your source and destination?

USER: My source and destination airport codes are MA-BOS, DC-IAD. And connections limit is one.

ASSISTANT: Please wait for a moment. I will check and get back to you.

USER: Sure.

ASSISTANT: We are glad to say that, there is an airline: UA, flight number: 1019 with one connection and price is 100.

USER: You can proceed to booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for your service.

ASSISTANT: Thanks for choosing us.