You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Frank Collins. Can you help me booking a flight ticket from ATL to DTW?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: I will start on Aug, 27 and return on Aug, 29.

ASSISTANT: Do you have any specifications?

USER: I need a break in my journey.

ASSISTANT: Ok, may I know your departure time and arrival time?

USER: I need to depart in the afternoon.

ASSISTANT: Sorry, no flights are available on your route.

USER: No problem, thank you for the information.

ASSISTANT: Welcome, have a nice day. Thank you for choosing us.