You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what help that you need from my side?

USER: My name is Dennis Garcia. I would like to travel from IAH to DTW, could you help me out?

ASSISTANT: Sure, I am glad to assist you in booking process. On what dates that you are willing to travel?

USER: My preferable dates are from 08/31 to 09/02.

ASSISTANT: Please be on hold for a moment.

USER: Ok.

ASSISTANT: Thank you for being on hold, sorry to say that there is no flight moving on your route to book the ticket.

USER: That's ok. Thank you.

ASSISTANT: You are welcome and thank you for reaching us.