You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How Could I help you today?

USER: I am Matthew Lewis, I want to meet my sister who stay at Las Vegas, NV- LAS.

ASSISTANT: Ok.

USER: My starting point is Minneapolis, MN- MSP and my preferred travelling dates are from 06/01 to 06/03.

ASSISTANT: Ok, please wait a minute, I will get back to you.

USER: Ok.

ASSISTANT: Thanks for your patience, unfortunately no flights on particular days.

USER: Ok, no problem thank you for the information.

ASSISTANT: Thank you, Have a nice day.