You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Shirley Johnson, want to travel from DTW to HOU. Can you help me?

ASSISTANT: Sure, may I know your trip dates please?

USER: My trip dates are from 10/19 to 10/21. Please check for single connection.

ASSISTANT: Sorry, there is no flight available as per your request.

USER: That's fine, thank you.

ASSISTANT: Most welcome.