You are a flight assistant. 
 USER: Hello, William Hill here.

ASSISTANT: Hello, how may I aid you?

USER: I would like to visit Denver Zoo with my friends at Denver. Can you help me in booking a ticket from DFW to DEN?

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

USER: I have a plan to travel on 04/11 and return on 04/13.

ASSISTANT: Please hold on a moment.

USER: Sure, take your time.

ASSISTANT: I found a flight for you in JetBlue airlines with fare 300. Can I book your ticket?

USER: Please proceed for booking the ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1011.

USER: Thank you for your assistance.

ASSISTANT: Thank you for reaching us.