You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I assist you today?

USER: Could you please provide a ticket from Philadelphia to Houston for arts and crafts festivals.

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: Source airport code PA-PHL and destination airport code TX-HOU.

ASSISTANT: May I know your price limit?

USER: Price limit is 5000.

ASSISTANT: Could you please provide me your depart and return dates?

USER: Sure. I will depart date by 11/28 and will return on 11/30.

ASSISTANT: May I know your name please?

USER: I am Kimberly Harris.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: We found a Delta airline, flight number: 1022, price: 200 with one connection.

USER: Please book a ticket.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks.

ASSISTANT: Thank you for opting us.