You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Robert Lee.

ASSISTANT: In which way I can assist you today?

USER: I want to book a ticket from Philadelphia to Houston to meet my parents.

ASSISTANT: Sure, I will help you in booking flight ticket. Can you please mention your travel dates for booking flight ticket?

USER: Sure, I am planning to travel on 06/04 and return on 06/06.

ASSISTANT: May I know your preferable airport code names?

USER: Departure airport code is PHL and destination airport is IAH.

ASSISTANT: Ok, just give me a moment, I will check flight availability.

USER: Ok.

ASSISTANT: There is a flight available, connection limit of this airline is 1 and price is 200. Shall I proceed?

USER: Please proceed for booking.

ASSISTANT: Your flight ticket is booked, airline is Frontier and flight number is 1004.

USER: Thanks for your help.

ASSISTANT: Thank you for reaching us, happy journey.