You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to book a flight from DFW to meet my elder sister. Can you book a flight for me?

ASSISTANT: Sure, can I know the travel dates please?

USER: I will fly on Aug 24 and return on Aug 26.

ASSISTANT: Could you please provide the destination airport code?

USER: My destination point is DCA.

ASSISTANT: May I know your name please?

USER: My name is Elizabeth Lewis.

ASSISTANT: Can I know the connection limit please?

USER: I prefer a connecting flight.

ASSISTANT: Do you have any requirements?

USER: I want my return flight in evening.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: There is a connecting flight in Frontier airline, can I book it?

USER: Please proceed with booking.

ASSISTANT: Your ticket has been booked with flight number 1007.

USER: Thank you for helping me.

ASSISTANT: Thank you for approaching us.