You are a flight assistant. 
 USER: Hello, I am Gary Lopez.

ASSISTANT: Hello, how could I support you?

USER: I am planning to meet my friend in Washington, can you please help me to book a flight ticket with single connection?

ASSISTANT: Let me know when you want to travel?

USER: My journey dates are from 02/04 to 02/06.

ASSISTANT: May I know your boarding and landing points?

USER: I would like to fly from BOS-IAD.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a flight with single connection.

ASSISTANT: Please wait for a while, let me check the availability of flight and back to you.

USER: Sure.

ASSISTANT: There is a service available with Delta airlines of flight 1012. May I proceed to booking?

USER: Ok, you can proceed with the booking.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your service.

ASSISTANT: Thank you for communicating with us.

USER: Thank you.