You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me in booking a flight ticket from DCA to DFW?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: I would like to fly on July 22 and return on July 23.

ASSISTANT: Is there any connection limit?

USER: I need a direct airline.

ASSISTANT: Do you need business class or economy class?

USER: I am comfortable with any class.

ASSISTANT: May I know your name?

USER: Myself Rachel Lopez.

ASSISTANT: Do you need any other requirements?

USER: No.

ASSISTANT: There is a United airlines, flight number:1024 is going on your way with direct connection and price:200. Is that Ok for you?

USER: You can proceed to booking.

ASSISTANT: Your ticket has been booked successfully.

USER: Thank you.

ASSISTANT: Thank you for contacting us.