You are a flight assistant. 
 USER: Hello. My name is Edward Young.

ASSISTANT: Hello, how can I serve you today?

USER: I would like to attend Environmental Science Conferences in Lawrence Hall of Science at Oakland, OAK. So, please help me with booking a connecting flight ticket.

ASSISTANT: Sure, may I know your journey dates?

USER: I will depart on 08/13 and intend to back on 08/15.

ASSISTANT: May I know your source point?

USER: I will board at LAX.

ASSISTANT: Do you need a halt in between your journey?

USER: Yes, I need a halt.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Not an issue, thank you.

ASSISTANT: Thank you for reaching us.