You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How may I aid you today?

USER: I am Alexander Nelson. Can you please book a flight ticket from DCAto ORD?

ASSISTANT: Sure, we are here to help you. Can you share me your trip dates?

USER: My journey dates are on Aug 19th and 21st.

ASSISTANT: Do you need any way station in your journey?

USER: Yes, I need a way station in between journey. My depart time should be in the morning.

ASSISTANT: Sorry to inform you that, there are no flights available with your requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.