You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, may I know the travelling dates?

USER: I want to depart on Aug 27 and need to return on Aug 29.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: Myself Benjamin Allen.

ASSISTANT: Sorry, no flights found with your chosen dates.

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

ASSISTANT: Thank you for opting us.