You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Scott Baker. I would like to fly from LAS, to meet my colleagues who are staying in DTW.Can you please aid me in booking a flight ticket?

ASSISTANT: Sure, can you share your trip dates?

USER: My trip dates are Aug 16th and Aug 18th.

ASSISTANT: Do you have any specifications?

USER: I need a halt. I can spend upto 5000.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for opting us.