You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I oblige you today?

USER: I need a flight ticket to attend my friend's baby shower program in Detroit, can you help me?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Could you please provide me your airport codes?

USER: Sure, my source airport code is Denver, CO - DEN and my destination airport code is MI - DTW.

ASSISTANT: May I know your budget for flight ticket?

USER: Sure, my budget is 5000.

ASSISTANT: Can you please share on what dates you are planning to travel?

USER: I am planning to travel from 09/18 to 09/20.

ASSISTANT: Please wait a moment, let me check the details of flight and get back to you.

USER: Sure.

ASSISTANT: May I have your name please?

USER: My name is Michael Robinson.

ASSISTANT: There is no flights found with your given information in our data base.

USER: Ok, not a problem. I will choose other alternative to reach my destination.

ASSISTANT: Thank you for availing us.

USER: Thanks for the response.