You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I help you?

USER: Please book a ticket from Denver, CO-DEN to Washington DC-IAD.

ASSISTANT: Ok, please provide me your travel dates.

USER: Sure. Travel dates are from 08/26 to 08/28.

ASSISTANT: Can I have your name please?

USER: I am Sharon Martin.

ASSISTANT: We found a connecting flight with price 300, flight number is 1011. Shall I make a move?

USER: Please do not book a flight as ticket price limit is 200.

ASSISTANT: Let me check.

USER: Ok.

ASSISTANT: Sorry, there are no flights with your given price.

USER: Thanks for the help.