You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I want to book a ticket from IAD to CLT. Could you book a ticket?

ASSISTANT: Sure, can you please share your travel dates?

USER: Travel dates are Sept, 19 and Sept, 21.

ASSISTANT: May I know your name to proceed further?

USER: I am Margaret Lopez.

ASSISTANT: Do you have any class preference?

USER: I prefer economy class ticket.

ASSISTANT: Margaret Lopez, there is a flight available with price 100 and the connection is 1 with Delta airline. Would you like me to proceed with the booking?

USER: Please book a flight.

ASSISTANT: Your booking is confirmed with 1004 flight number.

USER: Thanks.

ASSISTANT: You are welcome. Thank you for reaching us.