You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be of your helping hand?

USER: Can you please book a connecting flight from EWR to DEN?

ASSISTANT: Sure, help me with the trip dates?

USER: Sure, I want to start my journey on June 19 and need to end it on June 21.

ASSISTANT: Do you have any class preferences?

USER: Yes, I prefer a business class flight.

ASSISTANT: Let me know your connection limit?

USER: I already mentioned above.

ASSISTANT: Ok, may I know your name please?

USER: Myself Kenneth Hernandez.

ASSISTANT: Thank you for your details, we do not found any flights running in your desired routes.

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

ASSISTANT: Thank you for reaching us.