You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am Kevin Perez, I want to book a flight to Charlotte to watch a base ball game. Can you book a flight on 12/09 and return ticket on 12/11?

ASSISTANT: Sure, can you please share me your journey locations?

USER: My source point is CA-SFO and destination is a NC-CLT.

ASSISTANT: May I know your budget for flight ticket?

USER: My budget is 1000.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Sure.

ASSISTANT: Unfortunately, there is no flights found with your given details.

USER: Ok, thank you for the details, I will replan my trip.

ASSISTANT: Thank you for choosing us.