You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello,. How can I help you?

USER: I would like to attend Women's Fashion Week in Philadelphia, PA - PHL. Can you please help me in booking a flight ticket within the fare of 500?

ASSISTANT: May I know your travelling dates.

USER: My depart date is on 03/19 and arrive date is on 03/21.

ASSISTANT: Ok. Please specify your origin airport code.

USER: I wish to start from Houston, TX - HOU.

ASSISTANT: Please mention your name.

USER: My name is Samuel King.

ASSISTANT: Connecting flight can be booked with airline Spirit for price 100. Shall I book a ticket?

USER: Please confirm my flight booking.

ASSISTANT: Your ticket is booked with flight number 1004.

USER: Thanks for assisting me.

ASSISTANT: Thanks.