You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I respond to your request?

USER: I got an invitation to host a program, can you please book the ticket from DCA to HOU?

ASSISTANT: Sure, we are here to make your journey comfort. Will you mention your travelling dates please?

USER: Sure, I would like to depart from my source location on 4th June and I want to return back by 6th June.

ASSISTANT: Do you need a connecting flight or direct flight?

USER: I prefer single connected flight to travel.

ASSISTANT: Kindly share your name please.

USER: My name is Paul Wilson.

ASSISTANT:  Is there any other requirements for this trip to met with, so that I can find a suitable flight for your journey?

USER: No, I don't have any other specifications.

ASSISTANT: Thanks for providing your details, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, we found an economy class ticket providing by AA airline with the flight number-1029 and the fare 100, shall I book the connecting flight?

USER: That's fine for me, you can proceed for booking the ticket.

ASSISTANT: Your flight booking is confirmed and ticket has been emailed.

USER: Thank you so much for your help.

ASSISTANT: It's pleasure to serve you.