You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Mathew Evans want to attend  a  conference at Los Angeles. Can you book a direct flight?

ASSISTANT: May I know your travel dates?

USER: My travel dates are 12/17 and 12/29.

ASSISTANT: Please help me with your airport codes?

USER: I will depart from NY-JFK to CA-LAX.

ASSISTANT: Sorry, there is no flight found based on your details.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.