You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help for today?

USER: Myself Karen Hill.

ASSISTANT: Yes Karen, tell me.

USER: I planned to visit my vacation trip.I want to book a ticket.Can you please help me out?

ASSISTANT: Sure. Can I know your start and end point?

USER: My airport codes are from MN-MSP to NV-LAS.

ASSISTANT: Please provide your trip dates too.

USER: My travelling dates are from 06/30 to 07/02.

ASSISTANT: Sorry Karen, I didn't found any flight for you.

USER: Ok, no problem.

ASSISTANT: Thank you to visit here.

USER: Thank you.