You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, In what way shall I assist you for the day?

USER: Can you please help me to book a flight from EWR to ORD?

ASSISTANT: Sure, can I know your good name please?

USER: I am Patricia Robinson.

ASSISTANT:  When you are willing to travel?

USER: I want to travel on Mar 18 and need to return on Mar 20.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Are there any other specifications?

USER: I prefer an economy class to travel.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thank you for availing us.