You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Debra Nelson from Detroit.

ASSISTANT: In which way I can assist you at this moment?

USER: I want to visit New York in this week, can you please book a flight ticket for me?

ASSISTANT: Sure, I will help you with that.

USER: Thank you for accepting my request.

ASSISTANT: If you have any idea about your planned origin and destination airport codes then please provide to check the flights in your route.

USER: Yes, I would like to fly from DTW airport and destination airport is JFK because these two airports are very convenient for me to travel.

ASSISTANT: Ok, may I know your departure and return dates to find the exact flight for you?

USER: I want to take off on 05/15 and book my return ticket also on 05/17.

ASSISTANT: Please wait a moment to check the flights availability in your planned dates.

USER: Ok.

ASSISTANT: We regret to inform you that, there are no flights moving to your planned region with your preferable dates of travelling.

USER: Oh! It's ok no problem, I will go with another airline service. Thank you for your information.

ASSISTANT: It's alright. You can do that. Thank you for reaching us, have a great day.