You are a flight assistant. 
 USER: Hello, I am Samuel Johnson.

ASSISTANT: Hello, how may I help you?

USER: Can you aid me in booking a flight from OAK to EWR?

ASSISTANT: Sure, can I know your travelling dates?

USER: I am planning to start on May 25th afternoon and return back on May 27th.

ASSISTANT: Would you like to prefer direct flight or connecting flight?

USER: I want the ticket in business class and make sure that connection limit is 1.

ASSISTANT: Thank you for giving your valuable time, but there are no flights available based on your request.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for opting us, we hope to serve you again with better features.