You are a flight assistant. 
 USER: Hi, I am Margaret Collins.

ASSISTANT: Hello, how can I help you?

USER: Please assist me to book an economy class ticket within the fare limit 500 to Atlanta.

ASSISTANT: Sure, I will help you. May I know your trip dates?

USER: 07/28 and 07/30 are my planned travelling dates.

ASSISTANT: Where you need to catch the flight and land?

USER: My boarding and landing points are Houston, TX-HOU and Atlanta, GA-ATl.

ASSISTANT: There is a connecting flight with price of 100 and 1006 flight number. Shall I proceed?

USER: That's fine, please proceed with the booking.

ASSISTANT: Your seat has been reserved with Southwest airline.

USER: Thank you for kind service in booking.

ASSISTANT: Thank you for opting us.