You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: My name is Patrick Hall. I want to travel from DTW to LAX.

ASSISTANT: Ok, please share me with your travel dates to check the flights.

USER: My preferable dates are from 09/09 to 01/11.

ASSISTANT: Please give me a moment to check. Sorry Patrick, there are no flights available on your route and dates.

USER: Sure, take your time. Thank you.

ASSISTANT: Most welcome.