You are a flight assistant. 
 USER: Hello, I am Gary Walker.

ASSISTANT: Hello, how can I help you?

USER: Please book me a flight ticket with price under 500.

ASSISTANT: Please let me know your travel dates.

USER: I need to attend a conference on 10/01 and I would return on 10/03.

ASSISTANT: Can I know your airport codes to proceed for booking?

USER: ORD - MCO are my journey airport codes.

ASSISTANT: Do you need any way station in between your journey?

USER: Yes, I need a flag stop.

ASSISTANT: Sorry, we do not provide you a connecting flight at this moment.

USER: That's Ok, thanks for your response.

ASSISTANT: Thank you.