You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Can you please help me to book a ticket from IAH to ORD?

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: I want to start on June 17 and return on June 19.

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

USER: I am comfortable with any class.

ASSISTANT: Let me know your connection limit.

USER: I need a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I would prefer normal-cost airlines.

ASSISTANT: May I know your good name please?

USER: Richard Garcia here.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: We found 1018 UA airlines with single connection with economy class.

USER: You can proceed to booking.

ASSISTANT: Your ticket has been reserved with price 200.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.