You are a flight assistant. 
 USER: Hi. I am Richard Mitchell.

ASSISTANT: Hello, how can I guide you for today?

USER:  I want to visit Twin Peaks which is a popular park with views of the bay area, so I want to book a ticket from New York.

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I planned my trip from 01/13 to 01/15.

ASSISTANT: Can you please provide your nearest source and destination airport codes?

USER: I want to book from LGA to LAX.

ASSISTANT: Sorry, there is no flight available on this route on your requested dates.

USER: No issue, thank you.

ASSISTANT: Thank you for contacting us, have a safe journey.