You are a flight assistant. 
 USER: Hello, Laura Lewis here.

ASSISTANT: Hello, how can I aid you?

USER: I am planning to visit Griffith Park at Los Angeles, CA-LAX with my cousin. Can you please book me a ticket within the price 200?

ASSISTANT: Sure. I am happy to help you.

USER: I intend to travel from 06/19 to 06/21. My source point is Philadelphia, PA-PHL.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: Thank you for being patience. Sorry, there is no flights to Los Angeles.

USER: Ok, no issues. Thanks for your kind service.

ASSISTANT: Thank you for reaching us.