You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I am Margaret Jackson. Please book me a flight ticket on dates 12/17 and 12/19.

ASSISTANT: Sure, may I know your respective airports codes of travel please?

USER: Sure, my airport codes are Philadelphia, PA-PHL and Houston, TX-IAH.

ASSISTANT: Please wait for a moment.

USER: Ok, take your time.

ASSISTANT: There is a flight with the connecting flight of fare 400 and the airline is Frontier, are you ok with this booking?

USER: Yes, I am ok with it. Please book my ticket.

ASSISTANT: Ok, your booking is done with the flight number 1010.

USER: Thank you for the help.

ASSISTANT: You are welcome, have a nice day.