You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I help you?

USER: I am conducting a educational camp at New York, NY-EWR can you help me booking a flight ticket from Denver, CO-DEN?

ASSISTANT: Please provide your travelling dates.

USER: I will start on 11/23 and return on 12/25.

ASSISTANT: Please mention your name.

USER: I am Melissa Phillips.

ASSISTANT: No flights found for your requirement.

USER: No problem.

ASSISTANT: Thanks.

USER: Thank you for the information.