You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I need to travel Denver, can you please reserve flight ticket from ATL and DEN?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for your kind reply.

ASSISTANT: When you are willing to travel?

USER: My travelling dates are Aug,09 and Aug,11.

ASSISTANT: Do you have any class preference?

USER: I am ok with any flight service.

ASSISTANT: Do you have any other requirements?

USER: My depart time should be in the afternoon.

ASSISTANT: Do you have any connection limit?

USER: I am looking for one connection limit.

ASSISTANT: May I know your good name?

USER: Myself Samuel Hall.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: That's ok, I will choose any other alternate source to reach my destination.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.