You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: Can you book a flight ticket from OAK to BOS by the name Larry Lewis?

ASSISTANT: Sure, can you please provide your travel dates?

USER: My travelling dates are from 09/25 to 09/27.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Sure.

ASSISTANT: I found a flight for you with Delta airline and it costs you 600. Shall I proceed?

USER: I need a flight ticket with the price of 500, can you provide any discount for my ticket?

ASSISTANT: Sorry Lewis, there are no flights available with your budget.

USER: Ok, Thanks for the information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.