You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you help me to book a business class flight ticket?

ASSISTANT: Sure, can I know your airport codes?

USER: My airport codes are HOU and LGA.

ASSISTANT: Please share your travel dates?

USER: My travel dates are Jan 24 and Jan 26.

ASSISTANT: Do you need a stopover?

USER: I prefer connecting flight for this trip.

ASSISTANT: Do you have any other specifications?

USER: No, I don't have.

ASSISTANT: May I know your good name?

USER: My name is Eric King.

ASSISTANT: Sorry, there is no flight on your required route.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.