You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to visit The Battery at New York, could you book my ticket from ORD to LGA?

ASSISTANT: May I know your desired travel dates please?

USER: My trip dates are 03/10 and 03/12.

ASSISTANT: Can I know your name please?

USER: My name is Elizabeth Johnson.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.