You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER:  I am Lisa Williams want to travel to IL-ORD to attend Flower festival. Can you book a ticket from CO-DEN?

ASSISTANT: Sure, Please help me with your travel dates.

USER: My travel dates are 09/01 and 09/03.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for availing us.