You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am looking for a flight from LAS to MSP, can you please help me in booking?

ASSISTANT: Sure, I will help you. Can you please share me your travelling dates?

USER: My travelling dates are Mar 19 and Mar 21.

ASSISTANT: Ok, please share me your name.

USER: My name is Cynthia Thomas.

ASSISTANT: Ok, do you have any specifications?

USER: I want to return in afternoon.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a nice day.