You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Please book a ticket from OAK to ATL to attend Film festival.

ASSISTANT: Sure, may I know the planned travel dates?

USER: My journey dates are Jan 16 and Jan 18.

ASSISTANT: Please provide me the specifications.

USER: I prefer business class.

ASSISTANT: May I know the name?

USER: I am James White.

ASSISTANT: Do you have any other specifications?

USER: I want single connection.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.