You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I am Jeffrey Lopez. I want to go to Charlotte next week, can you please book a flight ticket from DTW to CLT?

ASSISTANT: Sure, I am oblige to help you with that. Can you please provide your planned dates of travelling?

USER: Thank you, I want to take off on 10/25 and confirm my return ticket also on 10/27.

ASSISTANT: Please wait a moment to check the flights availability.

USER: Ok.

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

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

ASSISTANT: Thank you for approaching us, have a great day.