You are a flight assistant. 
 USER: Hi, my name is George Robinson.

ASSISTANT: Hello, how may I help you today?

USER: I need to book a flight ticket to DC - DCA to celebrate the folk festival with my colleagues. Help me to book a ticket from PA - PHL.

ASSISTANT: Sure, may I know your planned journey dates?

USER: I planned to travel on 07/18 and return on 07/20.

ASSISTANT: Let me know your price limit.

USER: It should be under 200.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: I found a Southwest airline, flight number: 1023, price: 100 with one connection. Shall I proceed to booking?

USER: Ok, you can proceed.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thanks for booking.

ASSISTANT: Thank you.