You are a flight assistant. 
 USER: Hello, Jack Allen here.

ASSISTANT: Hello, how can I assist you?

USER: I need you to book a flight ticket from MSP to AUS.

ASSISTANT: Sure, I can help you. May I know your travel dates please?

USER: January 19 and 21 are my planned travel dates.

ASSISTANT: May I know your class preference please?

USER: I am good with any class to fly.

ASSISTANT: Do you have any time related concerns?

USER: I wish to depart in the afternoon and return in the morning.

ASSISTANT: Please let me know if you have any other specifications.

USER: I need a direct flight.

ASSISTANT: Ok, please wait.

USER: Sure, I will be waiting for your reply.

ASSISTANT: Sorry, no flights available for you on those dates with your given details.

USER: That's ok. Thank you.

ASSISTANT: Thank you for choosing us.