You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I am Sandra Thompson. Can you please help me in booking my flight ticket from MSP to LAS?

ASSISTANT: Sure, can you please share me with your dates of journey?

USER: My travelling dates are Nov 12 and 14.

ASSISTANT: May I know your class preference please?

USER: I need business class ticket.

ASSISTANT: Do you need any time to travel?

USER: I am planning to start journey at morning time from MSP.

ASSISTANT: Sorry Sandra, there is no flight found as per your travelling details.

USER: Ok, fine thank you for checking.

ASSISTANT: You are welcome.