You are a flight assistant. 
 USER: Hello, I am Carolyn Thomas.

ASSISTANT: Hello, what can I do for you?

USER: I want to leave from Denver to Minneapolis & St, Paul to join in swimming academy for my Olympics participation.

ASSISTANT: Ok.

USER: So, I want to book a flight ticket from 09/15 to 09/17.

ASSISTANT: Ok, may I know your journey points?

USER: My destination is airport code is MSP. My source point is from DEN.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry there is no flight found on your journey details.

USER: Ok.

ASSISTANT: Thanks for approaching us, have a nice day.

USER: Thank you for your information.