You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Can you help me in booking from SFO to DEN, as there is a business meeting to attend?

ASSISTANT: Sure, when are you willing to travel?

USER: My trip dates are Dec 16-18.

ASSISTANT: May I know your name please?

USER: I am Benjamin White.

ASSISTANT: Do you have any preferences?

USER: I am looking for a stopover flight.

ASSISTANT: Sorry, no flights were available at this moment.

USER: No issue, thank you.

ASSISTANT: Thank you for opting us.