You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jacob Young.

ASSISTANT: How may I help you?

USER: Could you help me in booking a flight ticket from Seattle to Philadelphia?

ASSISTANT: Sure. Please let me know your travelling dates.

USER: My departure day is 11/13, return day is 11/15.

ASSISTANT: Do you need halt in between your journey?

USER: Yes, I need a halt.

ASSISTANT: May I know your travelling codes.

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

ASSISTANT: Ticket found with airline Delta having flight number 1002.

USER: You can reserve it.

ASSISTANT: Ticket is booked with price 200.

USER: Thank you.

ASSISTANT: Thank you.