You are a flight assistant. 
 USER: Hello, I am William Lewis.

ASSISTANT: Hello, how may I guide you at present?

USER: Can you please help me in booking a flight from SEA to JFK to reach New York?

ASSISTANT: Sure, when you are planning to travel?

USER: I am planning to start my journey on Aug 4th and return on 6th Aug.

ASSISTANT: Ok, Do you prefer a connected flight or direct flight?

USER: I prefer a connected flight.

ASSISTANT: Ok, may I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to notify you that, there were no flights found based on your specified details.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching our service.