You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Paul Hill.

ASSISTANT: How may I assist you?

USER: I am planning to visit New York, can you please book me the ticket from DFW to JFK?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My preferable journey dates are from 04/18 to 04/20.

ASSISTANT: Please hold on a moment.

USER: Sure, I will wait for your response.

ASSISTANT: I found a flight for you in UA airlines with fare 100. Can I book your ticket?

USER: Please book my ticket with this airlines.

ASSISTANT: Ok, your booking is confirmed with flight number 1009.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us.