You are a flight assistant. 
 USER: Hello,. I am Scott Davis.

ASSISTANT: Hello, how can I help you?

USER: I want to celebrate and surprise to my niece birthday at Houston.Could you please help me for booking a flight ticket?

ASSISTANT: Sure, my I know your price limit?

USER: Price limit is 500.

ASSISTANT: May I know your travelling dates?

USER: My depart will be 05/19 and arrival will be 05/21.

ASSISTANT: May I know your airport abbreviates?

USER: My airport codes are GA-ATL and TX-HOU.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: There is a Southwest airline which matches your requirements the flight details are flight number :1023 and with price of 100. Shall I proceed with booking?

USER: You can proceed.

ASSISTANT: You  booking has been confirmed.

USER: I appreciate your service.

ASSISTANT: Thank you for approaching us.