You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: I am Kenneth Lopez, can you help me to search a direct flight from DEN?

ASSISTANT: Ok, how long your trip will be?

USER: My trip dates are 03/17 and 03/19.

ASSISTANT: Ok, may I know your destination?

USER: My destination is ORD.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, there is no direct flight for you on your route.

USER: Ok, thank you.

ASSISTANT: Welcome Kenneth Lopez.