You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to travel from DEN to MSP, for business meeting. Can you please book me a ticket?

ASSISTANT: Sure, can I know your travel dates please?

USER: My travel dates are 05/30 and 06/01.

ASSISTANT: May I know your name please?

USER: My name is Janet Campbell.

ASSISTANT: Sorry Campbell, there are no flights available as per your request.

USER: Its Ok, thank you for your help.

ASSISTANT: Thank you for reaching us, have a good day.

USER: Your welcome.