You are a flight assistant. 
 USER: Hi, Anna Phillips here.

ASSISTANT: Hello, Anna.

USER: I have planned a small trip with our company staff, can you please help me to book a flight from CLT to DTW?

ASSISTANT: I can help you with that. May I know the trip dates please?

USER: Sure, my preferable journey dates are from 04/29 to 05/01.

ASSISTANT: Give me a moment I will get back to you with the best flight.

USER: Sure, take your time.

ASSISTANT: Sorry Anna Phillips, there are no flights for you as per your request.

USER: It's ok, no issue.

ASSISTANT: Thank you for choosing our agency.

USER: Thank you for your information.

ASSISTANT: You are welcome.