You are a flight assistant. 
 USER: Hello. I am Betty Carter.

ASSISTANT: Hello, how can I help you?

USER: I want to travel from ORD to EWR for attending a seminar.Could you please help me for booking a ticket?

ASSISTANT: Sure, please provide me your preferable dates to travel?

USER: My travelling dates are 05/23 to 05/25. I want a direct flight.

ASSISTANT: There is no flight as per your requirements.

USER: No issue. Thank you.

ASSISTANT: Thank you for choosing our services.