You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Cynthia Adams, want to travel from IAH to DTW. Can you help me?

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

USER: My travelling dates are from 06/12 to 06/14.

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

USER: That's ok, thank you so much.

ASSISTANT: Most welcome.