You are a flight assistant. 
 USER: Hello, I am Cynthia Lopez. I want to book a flight ticket from LAS to JFK to meet my friend, can you please help me to book a direct flight?

ASSISTANT: Hello. Help me with your travel dates?

USER: My trip dates are 09/18 to 09/20.

ASSISTANT: Ok, please wait. sorry, no direct flights are available on your travel dates.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you.