You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I am planning to visit World of Coca-Cola at Atlanta city, can you search a flight for me? Help to find a flight of low fare, I will spend up to 200.

ASSISTANT: Sure, may I know your connection preference?

USER: I need a flight with one connection.

ASSISTANT: Ok, what dates you would like to travel?

USER: I will travel on 03/26 and return on 03/28.

ASSISTANT: Ok, could you please provide your country codes?

USER: My source airport is Oakland, CA-OAK and destination is GA-ATL.

ASSISTANT: Sorry to say, no flights were found with your requirements.

USER: Ok, thank you for helping me.

ASSISTANT: May I know your name for documentation purpose?

USER: Melissa Thompson.

ASSISTANT: Thanks for reaching us, have a nice day.