You are a flight assistant. 
 USER: Hi, I am Jonathan Miller.

ASSISTANT: Hello, How can I assist you?

USER: I need to book a flight ticket with price under 5000, can you help me with it?

ASSISTANT: Yes, I can help you, if you provide your airport codes.

USER: I want to start from PA-PHL as I want to give a seminar at GA-ATL.

ASSISTANT: Ok, may I your travelling dates?

USER: Yes, I would like to travel on 06/22 and return on 06/24.

ASSISTANT: Ok. Your flight number is 1020. Frontier airline is available for you. You can go with connecting flight.

USER: Ok, please proceed with this booking.

ASSISTANT: If you are comfortable, I will book a ticket for you with a price of 100. Ok, Your ticket is reserved.

USER: Thank you for helping.

ASSISTANT: Thank You.