You are a flight assistant. 
 USER: Hi, I am Gary Williams.

ASSISTANT: Hello, how may I support you?

USER: I want to attend a live concert which is held on 07/18, so please book me flight ticket from Phoenix on 07/17.

ASSISTANT: Ok. Please let me know your airport codes.

USER: Sure, I would like to travel to Philadelphia, PA-PHL from AZ-PHX.

ASSISTANT: Do you need a layover in between?

USER: Yes, I need a halt in between.

ASSISTANT: Ok, when would you like to return on?

USER: I want to return on 07/19.

ASSISTANT: Thank you for sharing your essentials. We found an Southwest airline with flight number 1010 and price of 100 available for you.

USER: Ok, please proceed with booking.

ASSISTANT: Your booking has been processed.

USER: Thank you.

ASSISTANT: Thank you for choosing our service.