You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: My name is Carol Evans, and I want to travel to Washington to visit National gallery of art. Can you make a reservation with a single connection?

ASSISTANT: Sure, I will help you with booking. Please share me your planned journey dates?

USER: Sure, I need to travel on 05/17 and 05/19.

ASSISTANT: May I know your budget for flight ticket?

USER: Sure, my affordable fare limit is 500.

ASSISTANT: Please share me the airport codes?

USER: Sure, I need to depart from Las Vegas LAS to Washington IAD.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry there is no flight avavilble on your journey details.

USER: Ok, no worries at all. Thanks for your help.

ASSISTANT: Thank you for reaching us, hope see you again.