You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I provide assistance to you?

USER: I am Frank Davis. my brother invite me for dinner at his home, can you help me to book flight ticket under fare of 500.

ASSISTANT: Sure, can you please provide your journey details?

USER: I will return from my brother house on 04/24 and take a flight on 04/22 to Charlotte.

ASSISTANT: Ok. May I know your source and destination codes?

USER: My source airport is Oakland, CA-OAK and destination airport code is NC-CLT.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a flight with one connection.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, we found a direct flight to Charlotte.

USER: Sorry I need a flight with one halt.

ASSISTANT: Ok, we do not have any connecting flights.

USER: Ok, thanks for helping me.

ASSISTANT: Thanks for reaching us.