You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Please aid me to book a flight from EWR to OAK?

ASSISTANT: Sure, may I know the travelling dates?

USER: Sure, I want to depart on Aug 26 and need to return on Aug 28.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: May I know your name?

USER: Jonathan Hernandez here.

ASSISTANT: Please wait a second.

USER: Sure.

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

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for opting us.