You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am David Parker. I am planning to attend my nephew birthday in Philadelphia, could you please help me in booking a flight ticket from Seattle?

ASSISTANT: Sure, please mention your intended dates of travel.

USER: I would like to fly on 08/15 and return on 08/17.

ASSISTANT: Can you help me with your journey airport codes please?

USER: My airport codes are WA - SEA, PA - PHL.

ASSISTANT: Do you need a stopover within your journey?

USER: Yes, I need a halt in between my journey.

ASSISTANT: Thank you for sharing your details. We found a Delta airline with flight number 1012 and price of 200.

USER: You can proceed to booking.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thank you for picking us.