You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Stephanie Perez. Can you please book a flight ticket from JFK to DTW?

ASSISTANT: Sure, may I know your travelling dates for your journey?

USER: Sure, I need to travel on dates of Feb 12 and Feb 14.

ASSISTANT: Do you need any specifications?

USER: Yes, I need to return in morning time.

ASSISTANT: Sorry, there are no flight tickets available on your journey dates.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching our service.