You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Katherine Miller. I have a plan to meet my friend in New York, can you help me for booking a flight ticket from MSP to LGA?

ASSISTANT: May I know your desired travel dates please?

USER: My travelling dates are 03/20 and 03/22.

ASSISTANT: Please wait a while.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us.