You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Kimberly Mitchell here. I want to fly from DCA to ATL. Can you check the availability of flight on this root?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My planned travelling dates are 01/14 and 01/16.

ASSISTANT: Do you have any limits about flight connection?

USER: I want a flight with maximum connection of 1.

ASSISTANT: Do you have any preferences about class?

USER: Make sure that, my return time should be in afternoon only.

ASSISTANT: Do you have any other preferences?

USER: No more, thank you.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there are no flights found under your preferable details.

USER: No issues, thank you for the information.

ASSISTANT: Welcome, have a great day.