You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you help me in doing a reservation from LGA to ORD?

ASSISTANT: Sure, I am glad to help you in booking. Can you please share your travelling dates?

USER: My trip dates are Mar 05 to 07.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: I need direct flight.

ASSISTANT: Which class do you prefer?

USER: I prefer business class.

ASSISTANT: Is there any time concerns in your journey?

USER: Please ensure that my depart time must be in afternoon.

ASSISTANT: Do you have any other requirement?

USER: No.

ASSISTANT: May I know your name for further process?

USER: Shirley Allen here.

ASSISTANT: Please wait a moment, let me check the flight availability on your route.

USER: Sure.

ASSISTANT: Sorry Shirley Allen, no flights are available on your preferable travel dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day.