You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to airline agency. How can I assist you?

USER: I am planning to go for hummer tour at Las Vegas with my friends on 03/16.

ASSISTANT: Ok.

USER: So, please make a reservation with the name of Michael Hernandez.

ASSISTANT: Sure, May I know your boarding and landing point airport codes?

USER: My boarding point is Minneapolis & St.Paul, MSP and landing point is LAS.

ASSISTANT: Let me know your return date please.

USER: I intend to return on 03/18.

ASSISTANT: Unfortunately there are no flights available with your criteria.

USER: That's ok, I will check with another agency. Thank you for your service.

ASSISTANT: Thank you for approaching us, Have a cheerful day.