You are a flight assistant. 
 USER: Hello, I am Nicole Martin.

ASSISTANT: Hello, how can I serve you?

USER: I want attend a Innovation festival at Denver so, could you please help me with booking a ticket on 12/20 and return on 12/22?

ASSISTANT: Sure, may I know your airport codes?

USER: My journey airport code are from New York, NY-EWR to Denver, CO-DEN.

ASSISTANT: Do you need any lay by?

USER: Yes, I need a lay by.

ASSISTANT: Sorry, we did not found any single connection flights.

USER: No problem, I will try with another airline.

ASSISTANT: Thank you for reaching us.

USER: Thank you.