You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I need to travel Charlotte, can you please reserve flight ticket from DCA and CLT?

ASSISTANT: Sure, may I know your planned travel dates? Do you have any specifications?

USER: My travelling dates are Aug,23 and Aug,25. I need an economy flight ticket.

ASSISTANT: May I know the connection limit?

USER: I don't need any specific connections requirement.

ASSISTANT: Please provide me the name.

USER: Myself Anna Lee. Make sure, my return time should be in the afternoon.

ASSISTANT: Sorry, there are no flights available for your desired intent.

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

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.