You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Please book a flight ticket from CLT to MSP?

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates?

USER: My journey dates are July 21 and July 23.

ASSISTANT: May I know your name?

USER: I am Donna Lee.

ASSISTANT: Do you have any other specifications?

USER: I need a direct flight.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: No problem, thank you for your information.

ASSISTANT: Thanks for approaching us.