You are a flight assistant. 
 USER: Hello, Nicole Scott here.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I have to planned to celebrate my grandmother 60th anniversary on  Denver CO - DEN.

ASSISTANT: Ok, can you please share your travel details?

USER: I want to reserve a ticket from Minneapolis& st. Paul, MN - MSP on 06/12. My arrival day on 06/14.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thanks for your time, sorry to inform no flight found with your requirement.

USER: OK, Thank you for the information.

ASSISTANT: Thanks for reaching us, have a good day.