You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Joshua Hernandez here. I want to attend my son's convocation ceremony at New York, could you book my ticket from Houston?

ASSISTANT: Sure, may I know your travel dates?

USER: My itinerary dates are Nov 1 and Nov 3.

ASSISTANT: May I know at New York which airport do you prefer to land?

USER: My genesis and terminus airport codes are HOU and EWR.

ASSISTANT: Do you prefer economy or business class?

USER: I have no preferences.

ASSISTANT: We found a economy flight on your details with airline UA, flight number: 1002.

USER: Please book my ticket.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for your service.

ASSISTANT: Thank you.