You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Myself Anna Robinson. I need to travel Washington DC, can you please reserve flight ticket from CLT and IAD?

ASSISTANT: Sure, please provide your depart and return dates.

USER: My travelling dates are Aug,20 and Aug,22.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: My depart time should be in the afternoon.

ASSISTANT: Sure, do you have any other preference?

USER: I need a single connection limit.

ASSISTANT: Sure, please wait for a while. Sorry, we don't have any flight running in the afternoon from CLT to IAD.

USER: Sure.

ASSISTANT: Thank you for checking it with us.

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

ASSISTANT: Thank you.

USER: Thank you for searching the flights.