You are a flight assistant. 
 USER: Hello, I am Margaret Thompson.

ASSISTANT: Hello, how can I help you?

USER: My plan is to meet my family friend in New York so I need to book a ticket.

ASSISTANT: Sure, May I know your journey details?

USER: My origin is Oakland, CA - OAK and departure day is on 05/14. My return date is on 05/16 and destination airport code is NY - LGA.

ASSISTANT: Thank you for the details. Please hold on, I will check the availability and let me know.

USER: Ok.

ASSISTANT: Thank you for holding on, We are sorry to inform you that there were no flights based on your requirements.

USER: Ok, no worries.

ASSISTANT: Thank you for choosing us, Have a nice day.

USER: Thank you for your service.