You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Can you book a flight ticket for my airport codes that is from SFO to MSP?

ASSISTANT: May I know your journey dates please?

USER: The trip dates are from June 15 to June 17.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I would like to prefer a stopover flight.

ASSISTANT: May I know your good name please?

USER: I am Donald Hernandez.

ASSISTANT: Do you need any other specifications?

USER: No, that is it.

ASSISTANT: Donald Hernandez, there is no flight currently available for your journey. Thank you for choosing our agency for your help.

USER: Not a problem. Thank you.

ASSISTANT: Have a nice day ahead.