You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you for the day?

USER: I have to attend for a meeting in LAS. Can you please book a flight from SFO?

ASSISTANT: Sure, can you please forward your journey dates?

USER: I want to travel on Oct 10 and need to return on Oct 12.

ASSISTANT: Do you need any connections in between journey?

USER: Yes, I need a connecting flight.

ASSISTANT: Do you prefer any class in your journey?

USER: I prefer an business class.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry no flights are available matching your given details.

USER: Ok, no problem.

ASSISTANT: For documentation purpose may I know your name please?

USER: Sure, my name is William Martinez. Thank you for the information.

ASSISTANT: Thank you for providing your name. Thank you for opting us.