You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you now?

USER: I have to meet my brother who is staying at oracle arena. For this I want to make a reservation. Can you make a reservation to me under the price limit of 500?

ASSISTANT: Sure, may I know your journey dates?

USER: I have to start my journey on 05/11. And it ends on 05/13.

ASSISTANT: Can you please provide me your airport codes?

USER: Source code: HOU. Destination code: OAK.

ASSISTANT: Do you need any stopover in between journey?

USER: Yes, I need a halt.

ASSISTANT: Sorry to inform you that there is no flight found on your journey dates.

USER: Ok, no problem.

ASSISTANT: May I know your good name please?

USER: I am Joseph Anderson.

ASSISTANT: Thanks for choosing us and have a nice day.

USER: Thank you for your information.