You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I want to book a ticket from IAH to JFK. Could you book a ticket?

ASSISTANT: Sure, please share me your travel dates.

USER: Departure is May, 9 and return date is May, 11.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: I am Jeffrey Rodriguez.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I prefer connecting flight.

ASSISTANT: May I know your class preferences?

USER: I would like to prefer business class.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Thank you.

ASSISTANT: Thank you for opting us.