You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you help me in booking a flight ticket from JFK to IAD?

ASSISTANT: Let me know your travel dates.

USER: I want to travel on 10/09, and return on 10/11.

ASSISTANT: Can I know your name?

USER: I am Patrick Lewis.

ASSISTANT: Do you have any preference?

USER: No.

ASSISTANT: Direct flight is found with American airlines for price 800.

USER: Proceed with the booking.

ASSISTANT: Ticket is booked having flight number 1027.

USER: Thanks for the help.

ASSISTANT: Thank you.