You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I would like to meet my cousins at Minneapolis, could you please help me in booking a ticket from OAK to MSP?

ASSISTANT: May I know your desired travel dates please?

USER: My travel dates are 09/10 and 09/12.

ASSISTANT: May I know your name please?

USER: My name is Justin Perez.

ASSISTANT: There is no flight on your desired travel dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for opting us.