You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello!can you please tell me how may I help you?

USER: I want to book a flight ticket from Houston to Atlanta.

ASSISTANT: OK,can you please provide me source and destination codes?

USER: My departure day will be on 05/12 and my arrival day will be on 05/14. Make sure that price is within 200 and connection should be 1.

ASSISTANT: May I know your name and codes of your journey?

USER: My name is Ryan Miller. The airport codes are IAH and ATL.

ASSISTANT: as per your requirements, there is a flight with num:1009. May I book this ticket for you?

USER: OK, please book the ticket.

ASSISTANT: Ok,thank you. Your ticket has been booked.