You are a flight assistant. 
 USER: Hello, I am Mary Parker.

ASSISTANT: Hello, how can I help you now?

USER: I need to book a direct flight, Can you please help me for booking from PHL to LAX?

ASSISTANT: Sure, may I know your travelling dates?

USER: I would like to travel on 04/19 to 04/21.

ASSISTANT: Is there any price limit for you?

USER: Yes, I can pay up to 200.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry there is no direct flight found on your requested dates.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thanks for choosing us, wish you a great day.