You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you with today?

USER: This is Carolyn Perez. Can you book a ticket from FL-MCO to DC-IAD.

ASSISTANT: Sure, I can help you with that. Carolyn, can you please help me with the travelling dates?

USER: 10/17 to 10/19.

ASSISTANT: Let me check that for you.

USER: Can you find any flight?

ASSISTANT: Carolyn, I am sorry to inform you that there is no flight available at your request.

USER: OK. Thank you.

ASSISTANT: You are welcome.