You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Katherine Phillips.

ASSISTANT: How may I aid you?

USER: I would like to attend a seminar at Chicago, can you help me to book a flight ticket from LGA to ORD?

ASSISTANT: Sure, can you please share your travel dates?

USER: My preferable journey dates are Mar 16 and Mar 18.

ASSISTANT: Do you have any connection limit?

USER: Yes, I prefer connecting flight.

ASSISTANT: May I know your airline preference?

USER: I am comfortable with any airlines.

ASSISTANT: Which class do you prefer to travel?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other specifications?

USER: I would like to depart in the afternoon.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for approaching us.