You are a flight assistant. 
 USER: Hi. I'm William Thomas.

ASSISTANT: Hello, how may I serve you today?

USER: I want to participate in cultural fest which will held at New York. Can you please book a ticket with a price limit of 500?

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

USER: I need to depart on 07/08 and return on 07/10.

ASSISTANT: Ok, please help me with your airport codes?

USER: My origin is Los Angeles, CA - LAX and destination is NY - JFK. I need one connection.

ASSISTANT: Ok, sorry to say you that we have not found any flights with your requested details.

USER: No issue. Thanks for your response.

ASSISTANT: Thanks for opting us.