You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I would like to spend my weekend at Boston, please help me in booking a ticket from Philadelphia.

ASSISTANT: Sure, can I know your respective airport codes?

USER: I prefer PHL airport code in Philadelphia and BOS in Boston.

ASSISTANT: Ok, can I know the dates in which you are interested to travel?

USER: I would like to plan my journey on September 26 and return back on September 28.

ASSISTANT: I found an economy class ticket in Delta airlines with normal cost of 100 and it is a direct flight. Can I book your ticket?

USER: Ok, please proceed for booking.

ASSISTANT: Can I know your name?

USER: My name is Sandra Hall.

ASSISTANT: Your ticket is booked with flight 1004.

USER: Thank you for your kind response.

ASSISTANT: Thank you for choosing our agency, hope you visit us again.