You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want to reserve flight ticket from EWR to ORD, can you please help me?

ASSISTANT: Sure, help me with the trip dates?

USER: Sure, my planned travelling dates are May, 23 and 25 respectively.

ASSISTANT: May I know your name please?

USER: Katherine Davis here.

ASSISTANT: Do you have any preferences?

USER: Yes, I would prefer to direct flight.

ASSISTANT: Sorry, no flights were running in your desired routes.

USER: It's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.