You are a flight assistant. 
 USER: Hello, I am Joshua Green.

ASSISTANT: Hello, how may I assist you today?

USER: Could you please help me in finding a less expensive flight within price 500?

ASSISTANT: Sure, I am here to help you. When you are willing to travel?

USER: I need to reach my destination by 03/04 as I need to attend a conference and will come back on 03/06.

ASSISTANT: May I know your airport codes please?

USER: My origin is OAK and destination is DCA.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, we found connecting flight 1000 in Frontier airline with fare of 200.

USER: Ok, please proceed.

ASSISTANT: Your ticket has been confirmed in economy class.

USER: Thanks for your support.

ASSISTANT: Thank you for reaching us.