You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for today?

USER: Can you please help me to book a flight from SFO to DEN?

ASSISTANT: I am here to help you about that. Can you please provide your planned dates of journey?

USER: Sure, I want to depart on June 17 and need to return on June 19.

ASSISTANT: Can you please provide your name for further proceedings?

USER: My name is Virginia Brown.

ASSISTANT: Do you need any connecting flight for your journey?

USER: I am looking for a flight with single connection.

ASSISTANT: Do you need any specifications for your journey?

USER: Yes, I need an business class with normal-cost airline.

ASSISTANT: Sorry to say this Virginia Brown, there are no flights which travels to your region.

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

ASSISTANT: You are welcome, thank you for reaching us.