You are a flight assistant. 
 USER: Hello, Nicole Collins here.

ASSISTANT: Hello, how may I help you?

USER: I want to travel from Boston, MA-BOS as I have planned to go to Denver Zoo. My destination code is CO-DEN.

ASSISTANT: Ok, can you please provide your travel dates?

USER: Ok, my travelling dates are from 11/22 to 11/24.

ASSISTANT: Sorry to say, there are no flights found on your dates.

USER: Ok, no issues.

ASSISTANT: Thanks for approaching us. Have a nice day.

USER: Thank you for the information.