You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Frank Hill. I have to attend a Live Concert at Atlanta, could you please help me with booking a flight ticket from DFW to SEA?

ASSISTANT: Sure, may I know on what dates you need booking?

USER: I would like to take off on 01/17 and return on 01/19.

ASSISTANT: The UA airline with flight number 1028 is available having fare as 300 and connection as 1.

USER: No, I need a flight with ticket fare 200 or less.

ASSISTANT: Ok, please allow me a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no flight on your request.

USER: That's ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us, have a great day.