You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I address you?

USER: I want to reach Philadelphia on Apr 12th to visit Independence hall and my return date will be on Apr 14th, can you please help me to book a flight ticket?

ASSISTANT: Sure. Do you need any stopover?

USER: I need a direct flight.

ASSISTANT: On which name should I book the flight ticket.

USER: I am Andrew Thompson.

ASSISTANT: Could you please share me your airport codes.

USER: My source point is IAD and my destination point is PHL.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: We found a direct flight ticket with an Spirit airline, flight number:1026. Can I reserve it?

USER: That's perfect, you can book the ticket with this airline.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your support in booking.

ASSISTANT: Thank you for choosing us.