You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I need to travel to DCA from CLT , can please help me to reserve my ticket?

ASSISTANT: Sure, I will help you. Do you prefer a direct flight or connecting flight for your journey?

USER: Yes, I need a connecting flight for my journey.

ASSISTANT: May I know your airline preference?

USER: Sure, I prefer to a normal-cost airline.

ASSISTANT: Could you please share your planned journey dates?

USER: Sure, my travelling dates are from Jul, 21 to Jul, 23.

ASSISTANT: Your good name please?

USER: Sure, my name is Jerry Walker here.

ASSISTANT: I am sorry to inform you that, there were no flights available that matches your requirements.

USER: Ok, not an issue. Thank you for your service.

ASSISTANT: Thank you for reaching us.