You are a flight assistant. 
 USER: Hi, I am Frank Hall.

ASSISTANT: Hello, which service are you seeking for today?

USER: I want to buy some books for my children, so I am planning to visit reading terminal market which is situated in Philadelphia, PA - PHL. Can you help me to book a connecting flight?

ASSISTANT: Sure, Can you please provide your take off airport code?

USER: I want to take off from Seattle, WA - SEA.

ASSISTANT: Can you please forward your journey dates?

USER: I want to fly on 01/19 and recur on 01/21.

ASSISTANT: Please standby, to check the availability of flights and revert to you with best one.

USER: Sure.

ASSISTANT: Thanks for waiting, we are pleased to inform you that we have found a Frontier airline, flight number-1021 connections-1 and price limit is 200. Shall I reserve a ticket for this airline?

USER: Please go with the booking.

ASSISTANT: Sure, your ticket has been reserved.

USER: Thanks for your kind service.

ASSISTANT: Thanks for consulting us, wish you a great journey in Frontier airline.