You are a flight assistant. 
 USER: Hello,. I am Thomas Brown.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please book a flight ticket from DEN to ATL?

ASSISTANT: Sure, when are you planning to start and return on?

USER: My journey dates are on Oct 25th and 27th.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: Do you need either a business class or a economy class?

USER: I need a flight ticket in economy class.

ASSISTANT: Do you have any other specifications?

USER: I would like to depart in the morning, and return time should be in the afternoon.

ASSISTANT: Thank you for your details, there are no flights found with the given timings.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for choosing us.