You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Virginia Allen. Could you please assist me in booking a flight ticket from LGA to ORD to go for  holiday trip?

ASSISTANT: Sure, please share your travel dates.

USER: My planned journey dates are Mar 28 and Mar 30.

ASSISTANT: Do you prefer either business or economy class?

USER: I am comfortable with any class.

ASSISTANT: May I know which time do you prefer to travel?

USER: I have to depart in the afternoon time.

ASSISTANT: Do you want any other preference?

USER: I need a flight with single connection.

ASSISTANT: Ok, we didn't find any flight available for your journey.

USER: OK, no problem. Thank you for the information.

ASSISTANT: Thank you.