You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me to book a flight ticket from PHL to LAX?

ASSISTANT: Sure, May I know your travelling dates?

USER: My travelling dates are Jan 29 to Jan 31.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: May I know your name?

USER: No. My name is Michelle Roberts.

ASSISTANT: Sorry, there are no flights found on your data.

USER: No problem, thanks for your information.

ASSISTANT: Thank you.