You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Jerry Robinson, planning to attend a seminar which is held on 07/16, so I want to start on 07/15 and return on 07/17. Please book a flight ticket for me.

ASSISTANT: Sure, may I know your airport codes?

USER: Yes, my airport codes are PA-PHL and TX-HOU.

ASSISTANT: How much you can afford for this ticket?

USER: I can afford up to 1000.

ASSISTANT: We found a flight on your details with airline Spirit, flight number: 1002. Shall I book this ticket?

USER: Please proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for the assistance.

ASSISTANT: Thank you.