You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Dennis Harris and I want to book a flight ticket to visit spirit of detroit at MI-DTW from TX-HOU.

ASSISTANT: Ok, may I know your travelling dates?

USER: My travelling dates are from 07/26 to 07/28.

ASSISTANT: Ok, please hold on. I will check the availability and get back to you.

USER: Ok.

ASSISTANT: Thanks for your time. We did not find any flights available at this moment according to your request.

USER: No issues. Thank you for your response.

ASSISTANT: Thanks for choosing us.