You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please make a reservation from SFO to DTW to attend a event in Detroit?

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

USER: My journey dates are, start on Jan 18th and arrival on Jan 20th.

ASSISTANT: Do you have any other requirements?

USER: I prefer a flight with single connection. And my return time must be in the morning.

ASSISTANT: Can I know your name please?

USER: My name is Jason Robinson.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: Ok, no problem. Thank you.

ASSISTANT: My pleasure.