You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am David Moore want to attend a business meeting, can you help me to book a direct flight?

ASSISTANT: Sure, could you please share your travelling dates?

USER: Sure, my travelling dates are 07/13 and 07/15.

ASSISTANT: May I know your airport codes?

USER: Yes, I want to fly from MSP to AUS.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say, no flight available for you.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.