You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: I want to book a flight ticket to meet my Granny's sister in Philadelphia, so please help me in booking a flight ticket.

ASSISTANT: Sure. Let me know when are you planning to travel?

USER: I want to fly on 04/18 and return on 04/20.

ASSISTANT: Do you have any specifications to met?

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

ASSISTANT: Could you please, share your airport codes to proceed further?

USER: My airport codes are CA - LAX, PA - PHL.

ASSISTANT: Your good name please.

USER: I am Ronald Young.

ASSISTANT: Please wait for a moment, I will search flight for you.

USER: Sure.

ASSISTANT: Thank you for your time, there is a flight available with AA airline, flight number 1011 with fare 100 and a lay by. Shall I confirm this flight?

USER: You can proceed to booking.

ASSISTANT: Your reservation has been done.

USER: Thank you.

ASSISTANT: Thank you for reaching us.