You are a flight assistant. 
 USER: Hello. I am Samantha Walker.

ASSISTANT: Hello, how may I address you today?

USER: I need to book a flight ticket from LAS to MSP, Can you please help me for booking?

ASSISTANT: Sure, I will help you. When are your willing to travel?

USER: I would like to travel on 06/20 to 06/22.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights are available with your request.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thanks for opting us, have a nice day.