You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to book a direct flight from LAS to MSP. Can you please help me with the booking?

ASSISTANT: Can I know your travelling dates?

USER: Sure, I wan to travel on July 11 and need to return on July 13.

ASSISTANT: Do you have any preference?

USER: No.

ASSISTANT: Let me know your name.

USER: Michelle Taylor here.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thank you for checking.