You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Raymond King.

ASSISTANT: How can I assist you?

USER: I want to visit LGA, can you help me to book a flight ticket from IAD?

ASSISTANT: Sure, please let me know your planned trip dates.

USER: I am travelling from Dec 1 to Dec 3.

ASSISTANT: Do you need any stopovers in between journey?

USER: Yes, I need a stopover in between my journey.

ASSISTANT: Thanks for providing details, we did not found any flights on your requirements.

USER: That's ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.