You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I support you today?

USER: My name is Nancy Adams. Please book a ticket from New York, NY-EWR to Denver, CO-DEN, for festival celebrations.

ASSISTANT: Ok, Nancy Adams. We are glad to help you for booking. May I know your journey dates?

USER: I intend to travel from 12/28 to 12/30.

ASSISTANT: Ok, may I know your budget?

USER: Price limit is 1000.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Unfortunately, we did not find any flights based on your request.

USER: Thanks for the help.

ASSISTANT: Thank you for opting our agency.