You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dennis Jackson.

ASSISTANT: How may I assist you?

USER: I need to book a flight ticket from JFK to PHL, Can you please help me for booking?

ASSISTANT: Sure, I will help you. May I know your travel dates?

USER: I would like to travel on 09/19 to return on 09/21.

ASSISTANT: Do you prefer economy or business class?

USER: I am comfortable with any class.

ASSISTANT: We found a flight on your details with airline Delta, flight number: 1000. Shall I book this ticket?

USER: Ok, proceed for booking.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your information.

ASSISTANT: Thank you.