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

ASSISTANT: Hello, how could I assist you today?

USER: I need to attend the meeting which is done at SFO on 03/16. Could you please help me in doing that?

ASSISTANT: Can you please mention your boarding point?

USER: My boarding point is OAK.

ASSISTANT: May I know your return date please?

USER: I intend to return on 03/18.

ASSISTANT: Unfortunately, there is no flights found with your given name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing us.