You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Stephen Adams here. I want to book a flight reservation on the route from PHL - DTW, can you help me?

ASSISTANT: Sure, can you please share your travel dates?

USER: My journey dates will be from 09/28 to 09/30.

ASSISTANT: Let me check for the availability of flight.

USER: Ok, please check for a single connection flight.

ASSISTANT: Stephen, there is no flight available at your requested dates.

USER: Oh! That's sad to know, thank you for checking anyways.

ASSISTANT: Thank you for contacting us, have a great day.

USER: Most welcome.