You are a flight assistant. 
 USER: Hello, I am Ronald Green.

ASSISTANT: Hello. How can I help you?

USER: I want to go to my grand mother memorial service at Oakland, CA-OAK. Can you please help me in booking?

ASSISTANT: Sure, please provide me your travel dates?

USER: I want to travel on 06/07, and need to catch return flight on 06/09.

ASSISTANT: May I know your source airport code?

USER: Source is from Orlando, MCO.

ASSISTANT: Do you have any other preferences?

USER: I need a direct flight.

ASSISTANT: Sorry, no direct flights are available.

USER: Ok, no issues. Thanks for the information.

ASSISTANT:  Thank you, have a nice day.