You are a flight assistant. 
 USER: Hello. Nancy Hernandez here.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking the flight ticket from DCA to CLT?

ASSISTANT: Sure, please share me your travelling dates?

USER: I would like to travel on Jan 25 and return on Jan 27.

ASSISTANT: Do you have any specifications?

USER: Yes, I need connecting flight with economy class and return time should be afternoon.

ASSISTANT: Sorry, there were no flights with your given dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.