You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am willing to travel from NV - LAS to IL - ORD, so please help me in booking a flight.

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are on 10/02 to 10/04.

ASSISTANT: How much you can afford for this ticket?

USER: I can afford up to 200.

ASSISTANT: On which name would like to reserve this ticket?

USER: Sure, I am James Clark.

ASSISTANT: Sorry there is no flight on your details.

USER: No issues, thank you for informing me.

ASSISTANT: Thank you.