You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am looking to book a flight ticket from IAD to IAH. Can you help me for that?

ASSISTANT: Sure, can I know your travelling dates?

USER: My travelling dates are June 19 and June 21.

ASSISTANT: On which name should I reserve the flight ticket?

USER: My name is Lisa Roberts.

ASSISTANT: Do you have any connection limit?

USER: I prefer to book a direct flight for my journey.

ASSISTANT: Do you have any other specifications?

USER: My return time is afternoon.

ASSISTANT: We found direct flight from JetBlue airline with price 600 and business class and airline number is 1021 with arrival time is 17:00 hours and departure time is 19:00 hours, Shall I proceed for booking?

USER: Ok, proceed for booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.