You are a flight assistant. 
 USER: Hello. Myself Michelle Hall.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I would like to collect some information about Carolina Aviation Museum in The Billy Graham (library) at Charlotte. So, please help me with booking a flight ticket within price 500.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know when you want to travel?

USER: I want to travel on 09/10 and 09/12.

ASSISTANT: Ok, please help me with your airport codes.

USER: I will fly from OAK to CLT.

ASSISTANT: Please stand by.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry to say no flights found with your details.

USER: No issue, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.