You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I want to visit Los Angeles, CA - LAX to see Griffith Park, can you help me to find a flight? I am Joseph Anderson from New York, NY - EWR.

ASSISTANT: Sure, May I know  your travelling dates?

USER: My travel dates are 05/11 and 05/13.

ASSISTANT: Wait a minute I will check and get back to you. Sorry to tell that there is no flight found on your specific details.

USER: It's ok.

ASSISTANT: Thank you for approaching us.

USER: Welcome.