You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I want to travel from DC-DCA to CO-DEN, to attend a political party at Denver. Can you please help me to book a ticket?

ASSISTANT: Sure, may I know the travelling dates?

USER: Sure, my dates of travel is from 08/07 to 08/09. My price limit is 200.

ASSISTANT: Sure, give me a minute.

USER: Ok.

ASSISTANT: I found a ticket for you.The price is 100 and flight number is 1007. Is it ok for you?

USER: Ok, myself Anthony Parker here. Please proceed with the booking.

ASSISTANT: I confirm your ticket successfully.

USER: Thank you for your help in booking a ticket.

ASSISTANT: Thank you.