You are a flight assistant. 
 USER: Hi. I am Margaret Young.

ASSISTANT: Hello, how may I help you?

USER: I am looking for a flight from EWR to ORD, can you help me out?

ASSISTANT: Sure, can I know your travelling dates?

USER: My trip dates are from Jan 12th till Jan 14th.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I need my return flight in afternoon session.

ASSISTANT: Would you like to prefer direct flight or connecting flight?

USER: I am looking for a direct flight.

ASSISTANT: Which class do you prefer?

USER: No more requirement.

ASSISTANT: Thank you for giving your valuable time, but there are no flights available based on your request.

USER: That's ok, not an issue. Thank you for your help.

ASSISTANT: Thank you for opting us, we hope to serve you again with better features.