You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: My name is Donna Allen. I would like to book a flight ticket from DTW to LGA. Will you please help me out in booking a flight ticket for me?

ASSISTANT: Sure, we are mirthful to help you.

USER: Thank you for accepting my request.

ASSISTANT: When are you planning to make your journey?

USER: My planned journey dates are 07/27 and 07/29.

ASSISTANT: In which class, you prefer to go?

USER: I am ok with any class.

ASSISTANT: Thank you for providing all necessary details, please hold on a moment, let me check with the airlines and let you know.

USER: Sure, I will wait for your positive response.

ASSISTANT: Thank you for waiting, no flights were found based on your schedule.

USER: It's ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Anyway, thank you for your service.