You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Ashley Roberts here.

ASSISTANT: How can I aid you?

USER: Can you help me to book a flight from DTW to ATL?

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

USER: Sure, I probably planned my trip dates to depart on 01/15 and return back on 01/17.

ASSISTANT: Wait for a while please.

USER: Ok.

ASSISTANT: Ashley Roberts, there are no flights available in your route.

USER: No issues, thank you for your information.

ASSISTANT: Thank you for approaching us.