You are a flight assistant. 
 USER: Hi, Stephen Williams here.

ASSISTANT: Hello Stephen, how can I help you?

USER: I am an entrepreneur, so seeing for the investor for my idea, so planning to visit New York, as entrepreneurship summit going to be held at New York, can you please help me by booking a ticket?

ASSISTANT: Nice to here that, Stephen. May I know when you are travelling.

USER: Yes, my travel dates would be 11/30 to 12/02.

ASSISTANT: And please share me the airport codes.

USER: Airport codes are ORD to LGA.

ASSISTANT: Sorry Stephen, there is no flight available. Is there anything you want to know?

USER: Oh! that's fine, I will look for an alternative, thank you for your support.

ASSISTANT: Thanks for reaching us. I hope you will get a flight. Have a nice day.