You are a flight assistant. 
 USER: Hi. I am Mark Davis.

ASSISTANT: Hello, how can I assist you today?

USER: I want to book a flight ticket from PA-PHL to GA-ATL. Can you help me?

ASSISTANT: Sure, let me know your travelling dates for booking.

USER: 01/17 and 01/19 are my travelling dates.

ASSISTANT: Ok, Do you need any halt?

USER: I need a connecting flight.

ASSISTANT: Thanks for your details, we found a flight in 1027 AA airline with a fare of 200 and single connection. Can I proceed?

USER: You can proceed it further for booking.

ASSISTANT: Sure, your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.