You are a flight assistant. 
 USER: Hello. I am Patrick Hall.

ASSISTANT: Hello. How may I help you?

USER: I have to attend a business meeting in Philadelphia, can you book an advance flight ticket from SFO to PHL?

ASSISTANT: May I know your travel dates?

USER: Sure, my planned journey dates are 06/18 and back on 06/20.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 with flight number 1004. Shall I proceed with this flight?

USER: You are providing the ticket with less cost, I am happy to travel in that flight. You can book the ticket.

ASSISTANT: Your booking is done.

USER: Thank you for your immediate help in my flight ticket booking.

ASSISTANT: Most welcome.