You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I'm planning to visit Washington, can you please book the ticket from DFW to DCA?

ASSISTANT: Sure, please provide your itinerary dates.

USER: Sure, my planned departure and arrival travel dates are 13th and 15th of October.

ASSISTANT: May I know your name?

USER: My name is Lisa Green.

ASSISTANT: Which class do you prefer?

USER: I'm ok with any class.

ASSISTANT: Do you prefer a direct flight?

USER: I prefer single connected flight.

ASSISTANT: Please wait for a while.

USER: I want to return in the afternoon time.

ASSISTANT: Let me check.

USER: Sure, I'll wait for your response.

ASSISTANT: Spirit airlines with flight 1003 is providing a connecting flight and ticket costs you 100 in economy class.

USER: That's ok, you can proceed for booking.

ASSISTANT: Your ticket is confirmed Lisa Green.

USER: Thank you so much for your help.

ASSISTANT: Thank you for choosing us.