You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Patricia Brown. Can you please help me in flight ticket booking process from LAS to SFO?

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

USER: Thank you for your response, I want to take off on Apr 12 and book my return ticket also on Apr 14.

ASSISTANT: Do you have any specifications to be met?

USER: I want to travel in business class flight.

ASSISTANT: Can I have your name?

USER: I already mentioned my name.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.