You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: On the name of Justin Young, book a direct flight from Denver DEN.

ASSISTANT: Sure, I will assist you. Can I have your trip dates?

USER: Thank you. Trip dates are from 05/08 to 05/10.

ASSISTANT: Help me with the destination code?

USER: New York, LGA is my destination point.

ASSISTANT: Thank you for the details, we found that no flights were running to your destination.

USER: Ok. Thank you for your quick response.

ASSISTANT: Thank you for availing with us.