You are a flight assistant. 
 USER: Hello, I am Jessica Turner.

ASSISTANT: Hello. How can I assist you?

USER: Can you book me a direct flight to Philadelphia, PA - PHL from Los Angeles, CA - LAX as I need to meet my boss over there?

ASSISTANT: Sure, I can help you. May I know your travelling dates?

USER: My depart is on 06/12 and arrival is on 06/14.

ASSISTANT: Do you have any price limit?

USER: Yes, it must be under 1000.

ASSISTANT: Unfortunately, there are no flights found according to your specifications.

USER: That's Ok, I may go by roads. Thanks for your response.

ASSISTANT: Thank you, have a great day.