You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how could I serve you?

USER: I am David Carter.

ASSISTANT: Ok.

USER: Me and my friends are going for a vacation to Los Angeles, LAX. I need a direct flight. Will you help me in this?

ASSISTANT: Sure, may I know your boarding point?

USER: Boarding point is Minneapolis & St. Paul, MSP.

ASSISTANT: Could you please let me know your travelling dates?

USER: From 02/14 to 02/16.

ASSISTANT: May I know the budget for plane reservation?

USER: My price limit is 500.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry to inform, there is no direct flight on your given dates.

USER: No problem, I will go with another flight.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your response.