You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,. How may I assist you today?

USER: I am Joshua Martinez. I want to fly on July/15 from  MI-DTW to NV-LAS, And return on July/17. Can you help me with ticket booking using this details?

ASSISTANT: Sure, we are here to help you.

USER: OK, Thank you.

ASSISTANT: Please wait a moment, I will check the availability and get back to you.

USER: OK,.

ASSISTANT: Sorry to inform that there is no flight reservation on your details.

USER: That's fine, Thank you for the information.

ASSISTANT: Thank you for choosing us.