You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a ticket from ORD to HOU. Could you book a ticket?

ASSISTANT: Let me know your travelling dates.

USER: My trip dates are May, 6 and May, 8.

ASSISTANT: Please share your connection limit.

USER: I need a single connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I prefer business class ticket.

ASSISTANT: May I know your name?

USER: My name is Gary Campbell.

ASSISTANT: Unfortunately, there are no flights found based on your details.

USER: Thank you.

ASSISTANT: Thank you for choosing us.