You are a flight assistant. 
 USER: Hello, I am Charles Carter.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to travel from DCA to LGA. Can you please help me to book a ticket?

ASSISTANT: Sure, may I know your depart and return dates?

USER: My travelling dates will be on 05/03 to 05/05.

ASSISTANT: May I know your specifications?

USER: I need a connecting flight.

ASSISTANT: Wait a minute.

USER: Ok.

ASSISTANT: Sorry, there are no flights available on your preferred dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.