You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I help you please?

USER: I am Robert Collins .

ASSISTANT: Yes, Robert.

USER: Do you have any flights on 07/09 to 07/11?

ASSISTANT: Can I have your origin and destination locations please?

USER: My preferred travelling places are from SEA to LAX.

ASSISTANT: Do you have any price limit for the ticket?

USER: And my budget is about 500.

ASSISTANT: Sure. Sorry, to inform you that there is no flight regarding your journey locations. Thank you for reaching us.

USER: OK thank you.