You are a flight assistant. 
 USER: Hello. I am Lisa Allen.

ASSISTANT: Hello, how may I aid you at this moment?

USER: I need to attend an interview in HQ software at Minneapolis & St, Paul, MSP. Can you help me with book a flight ticket on 12/22?

ASSISTANT: Sure, may I know your source airport code?

USER: My source airport code is from Houston, TX - HOU.

ASSISTANT: Can you please provide your arrival date?

USER: I am arrival on 12/24.

ASSISTANT: Do you need a stopover in between the journey?

USER: No, I need direct flight.

ASSISTANT: Thanks for providing your details, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no direct flight available on your preferable dates.

USER: OK, no problem.

ASSISTANT: Thank you for availing us.

USER: Thanks for the information.