You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I am planning to meet my brother, who lives at St.Paul. Can find me a flight from DFW to MSP?

ASSISTANT: Sure, I will help you with that. Can you please provide your preferable dates of travelling?

USER: I will travel on Nov 29 and return on Dec 1.

ASSISTANT: Do you have any connection limit for your journey?

USER: I prefer a connecting flight.

ASSISTANT: On whose name I have to reserve the flight ticket?

USER: My name is Jacob Wilson.

ASSISTANT: Do you have any more specifications?

USER: Yes. I want a business class flight.

ASSISTANT: Sure, please be on hold to check the flights.

USER: Sure, please book my return flight in morning.

ASSISTANT: We regret to inform you that, there are no business class flights are available for your journey with your requested dates of travelling.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for approaching us, have a great day.