You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: David Lee is here. I am planning to meet my ex-colleagues who are staying in Minneapolis & St Paul MN-MSP, so I would like to fly from Austin TX-AUS. Can you please assist me in booking a flight ticket?

ASSISTANT: Sure, may I know if your intend to have a connection within your journey?

USER: I need a direct flight.

ASSISTANT: Please mention your planned dates of travel.

USER: My planned dates are 03/15 and 03/17.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your time. There are no flights found according to your requirements.

USER: Ok, no issues at all. Thank you for your service.

ASSISTANT: Thank you for choosing us.