You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your good name please?

USER: I am Emily Anderson.

ASSISTANT: How can I assist you today?

USER: I am planning to attend a Crash Course in Denver, could you please help me in booking a flight ticket from New York?

ASSISTANT: Sure, we are here to help you. May I know how much you can afford for a flight ticket?

USER: I can afford up to 1000.

ASSISTANT: Ok, could you please provide me your source and destination airport codes?

USER: My airport codes are NY - JFK, CO - DEN.

ASSISTANT: Do you need halt in between your journey?

USER: No, I need a direct flight.

ASSISTANT: Ok, may I know your scheduled journey dates?

USER: I would like to fly on 11/22 and return on 11/24.

ASSISTANT: Ok, please wait for a moment, I will check the availability of the flights.

USER: Sure, I will wait.

ASSISTANT: Sorry to say that, there are no flights found with your given details.

USER: Not an issue. Thank you for your information.

ASSISTANT: Thank you for opting us.