You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I help you today?

USER: Please book a ticket to Las Vegas, NV-LAS from Washington, DC-DCA, for an autoshow.

ASSISTANT: Sure, can you please share your travel dates?

USER: My travel dates are from 05/27 to 05/29.

ASSISTANT: May I know your good name please?

USER: Jack Martinez is my name.

ASSISTANT: Do you have any specifications?

USER: Price limit 500. Connections limit 1.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry to say that we have not found any flights with your given details.

USER: Thanks for the help.

ASSISTANT: Thanks for choosing us.