You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I help you?

USER: My name is Richard Jones. Could you help me for booking.

ASSISTANT: Sure, Richard. May I please know your journey details?

USER: I want to travel from TX - DFW to DC - DCA.

ASSISTANT: When do you want to travel?

USER: OK, My depart date is 12/17 and return date is 12/19 and with 1 connection and the price limit is 5000.

ASSISTANT: OK. Just give me a moment to check. Please, wait.

USER: OK.

ASSISTANT: Thanks for waiting. There is a flight according to your specifications. The flight is of Spirit airline with the flight number of 1000. And, the ticket price is 100. Shall I proceed?

USER: OK, You can proceed for booking.

ASSISTANT: OK. Your ticket has been booked. Thanks for contacting us.

USER: OK, Thank you.

ASSISTANT: Have a great day.