You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Kathleen Clark. Can you help me in booking a flight ticket from NY - JFK to NV - LAS?

ASSISTANT: Sure, may I know your travel dates?

USER: I want to fly on 09/04 and return on 09/06.

ASSISTANT: At what price range are you looking for?

USER: I can afford upto 5000.

ASSISTANT: Sorry there is no flight available on your details.

USER: Not an issue. Thank you.

ASSISTANT: Thank you.