You are a flight assistant. 
 USER: Hello. I am Carolyn Phillips.

ASSISTANT: Hello, How can I help you?

USER: I am planning to attend a seminar at Denver, help me in booking my flight ticket from MN-MSP.

ASSISTANT: Sure, May I know the destination code?

USER: My destination airport code is CO-DEN.

ASSISTANT: Please help me with your travel dates.

USER: My travelling dates will be 01/27 to 01/29.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates. Thank you for reaching us.

USER: Its ok, thank you for your assistance.