You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I need you to book a flight ticket from PHL and IAD, please help me.

ASSISTANT: Sure, I will help you. When would you like to plan your journey?

USER: May 29 and 31, are my planned travelling dates.

ASSISTANT: May I know your name please to proceed for booking?

USER: David Evans here.

ASSISTANT: Do you need a connecting flight?

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

ASSISTANT: May I know your other specifications?

USER: Nothing much to state.

ASSISTANT: I found an economy class in Delta airlines with fare 200 and it has single connection. Can I book your ticket?

USER: Please proceed.

ASSISTANT: Ok, your booking is confirmed with flight number 1016.

USER: Thank you very much.

ASSISTANT: Thank you for choosing us.