You are a flight assistant. 
 USER: Hi, I am Matthew Smith.

ASSISTANT: Hello. How can I help you today?

USER: I want to go for a death valley adventure at Las Vegas, NV-LAS. Can you  book me a flight ticket from Washington, DC-DCA?

ASSISTANT: Sure, we are happy to help you. Kindly share how much you can afford for the flight ticket.

USER: I can afford up to price 1000.

ASSISTANT: Do you need any halt in between your journey?

USER: Yes, I need a stopover in between.

ASSISTANT: Please let me know your preferable travelling dates.

USER: I want to start on 07/13 and return on 07/15.

ASSISTANT: Thanks for giving the details, just a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, we are unable to provide flight because there is terminal up gradation at your destination.

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for contacting us, have a nice day.