You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Assist me in booking a flight ticket from DCA to HOU.

ASSISTANT: Yes, can you tell me your dates of travel?

USER: I planned to travel in between Dec 19 and Dec 21.

ASSISTANT: Do you have any preferences?

USER: Connection flight is required.

ASSISTANT: Give me a moment.

USER: Sure,take your time.

ASSISTANT: I have found an economy class ticket with a price of 100 and 1 connection.

USER: Proceed to book it.

ASSISTANT: Can I know your name for booking?

USER: Ryan Turner here.

ASSISTANT: Your ticket has been booked.

USER: Thanks for booking.

ASSISTANT: Thank you for contacting us.