You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I need your assistance in booking a ticket from CLT to DCA, can you help me with that?

ASSISTANT: Sure, help me with the trip dates?

USER: Sure, my planned departure and return travel dates are 26th and 28th of August.

ASSISTANT: May I know your name please?

USER: My name is Samantha Perez.

ASSISTANT: Do you have any preferences?

USER: Yes, I need direct flight.

ASSISTANT: Sorry, no flights were running in your desired routes.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for reaching us.