You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Michelle Turner. I want to book a flight ticket to attend a party at NV-LAS from MN-MSP. Can I help you?

ASSISTANT: Sure, may I know your travelling dates?

USER: 04/14 and 04/21 are my travelling dates.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: Unfortunately there is no flight found matching your requirements.

USER: No issue. Thank you for your service.

ASSISTANT: Thank you for choosing us.