You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Robert Gonzalez here. Can you please reserve me a flight ticket from DTW to SEA?

ASSISTANT: Sure, may I know your journey dates?

USER: Sure, my travel dates are from Apr 27 to Apr 29.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: That's ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing us.