You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Betty Lopez, want to travel from MSP to CLT. Can you book my ticket?

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are from 01/16 to 01/18.

ASSISTANT: Sorry, there is no flight available as per your request.

USER: That's fine, thank you.

ASSISTANT: Most welcome.