You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Carolyn Turner here. I want to travel from ORD to EWR for attending a Seminar. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: My travelling dates are from 07/15 to 07/17.

ASSISTANT: Please allow me a moment.

USER: Ok, I will wait.

ASSISTANT: Sorry, there is no flight in your route.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.