You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Sarah Thomas here.

ASSISTANT: Welcome to flight booking agency, how can I serve you at this moment?

USER: As a part of my project, I'm planning to prepare a documentary on some of the historical places at Philadelphia. so can you please help me in booking a ticket from Seattle?

ASSISTANT: Sound's good, I will try my level best to serve you. Can you please share your travelling airport codes?

USER: Sure, my journey dates are 12/13 and 12/15.

ASSISTANT: May I know your preferable journey dates to proceed further?

USER: My airport codes are SEA and PHL.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Frontier airlines is available on this route with a ticket fare of 100, shall I book your ticket?

USER: That's fine, please proceed booking.

ASSISTANT: Sarah Thomas, your ticket is booked with flight number 1002.

USER: Thank you for your help.

ASSISTANT: Thank you, have a safe journey.