You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I would like to visit the National Air and Space Museum at Washington so, can you book a ticket for me?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: I have planned to travel on May 11 and return on May 13.

ASSISTANT: Can you please share your airport codes?

USER: My journey airport codes are PHL and DCA.

ASSISTANT: Do you have any class preference?

USER: I prefer an economy class.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I would like to travel in a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: There is a flight available on your requested dates from American Airlines with arrival time 23 PM and depart time 8 AM, shall I confirm your booking?

USER: Yes, please confirm it.

ASSISTANT: May I know your good name please?

USER: My name is Benjamin Jones.

ASSISTANT: Your ticket is booked with flight 1007.

USER: Thank you for your assistance.

ASSISTANT: You are welcome.