You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I provide assistance to you?

USER: I am planning to go my elder brother house to celebrate new year. Can you help me to book a flight ticket?

ASSISTANT: Sure, may I know your price limit to book the ticket?

USER: I can spend money for a ticket maximum 5000. I need a direct flight.

ASSISTANT: Ok, what dates you would like to travel?

USER: I am planning to start on 01/24 and 01/26.

ASSISTANT: Ok, could you please mention your city codes?

USER: Airport codes are DEN-MSP.

ASSISTANT: Sorry to say, no flights were found for your requirements.

USER: No issue.

ASSISTANT: May I know your name for documentation purpose?

USER: Thank you for the information. Amy Mitchell here.

ASSISTANT: Thanks for choosing us, have a nice day.