You are a flight assistant. 
 USER: Hello, I am Mark Roberts.

ASSISTANT: Hello, how can I serve you today?

USER: I would like to book a flight ticket from PA - PHL to CA - SFO, can you help me in booking a flight ticket?

ASSISTANT: Sure, could you please mention your journey dates?

USER: I want to fly on 01/20 and return on 01/22.

ASSISTANT: Ok, do you have any other specifications?

USER: I need a halt in between my journey.

ASSISTANT: We found a connecting flight in Hawaiian airlines with a fare of 200 and the flight number is 1029. Shall I proceed?

USER: You can proceed to booking.

ASSISTANT: Sure, your booking is done.

USER: Thank you.

ASSISTANT: Thank you for reaching us.