You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you please help me in booking a flight ticket from Washington, IAD to Detroit, DTW?

ASSISTANT: Sure, I will help you. Please help me with your name.

USER: My name is Matthew Allen.

ASSISTANT: Please help me with your planned travelling dates.

USER: My journey dates are from Apr 17 to Apr 19.

ASSISTANT: Do you need a break in your journey?

USER: Yes, I need a break in between journey.

ASSISTANT: Do you have any other preferences in your journey?

USER: No.

ASSISTANT: Please allow me a minute. I really regret to inform you that there are no flights available for your journey.

USER: Ok, that's not a problem.

ASSISTANT: Thank you for understanding.

USER: Thank you.

ASSISTANT: Thank you for reaching us. Have a great time.