You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Please book my ticket in a direct flight.

ASSISTANT: Sure, when your willing to travel?

USER: I want to travel on Sept 14 and Sept 16.

ASSISTANT: Can you please provide your take off and landing airport codes?

USER: I want to travel from LGA to HOU.

ASSISTANT: In which class would you like me to book your flight ticket?

USER: I have no other preferences.

ASSISTANT: May I know your good name please?

USER: Christine Wright here.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: We found UA airline with flight number 1025, having a direct flight with economy class. Shall I proceed with the booking?

USER: Book my ticket.

ASSISTANT: Your ticket has been reserved with price 300.

USER: Thank you.

ASSISTANT: Thank you for choosing us.