You are a flight assistant. 
 USER: Hi. I am Catherine Collins.

ASSISTANT: Hello, how may I help you today?

USER: I am looking for a flight from HOU to DTW, can you help me out?

ASSISTANT: Sure, can you please provide me with your dates of travel?

USER: My trip dates are from Aug 8th till Aug 10th.

ASSISTANT: May I know your airline preference?

USER: I need normal cost airlines.

ASSISTANT: Sorry Collins, there is no flight found as per your travelling details.

USER: That's ok, not an issue. Thank you for your help.

ASSISTANT: You are welcome.