You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Matthew Hall. I need to book a ticket from PHX to DTW, can you help me in that?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My travelling dates are 12/22 to 12/24.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I need one halt in my journey.

ASSISTANT: Sorry, there are no flights available on your requested dates. Thank you for contacting us, have a nice day.

USER: Thank you for your service.