You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I'm Raymond Allen. I need to attend a wedding in Washington.Can you book a ticket from EWR to IAD?

ASSISTANT: Can I know your dates of journey?

USER: The departure is on 11/25 and return is on 11/27. My connection limit is 1.

ASSISTANT: Sorry Raymond, I did not find any flight basing on your details.

USER: That's so sad.

ASSISTANT: Thank you for reaching us.

USER: Anyway thank you for your help.

ASSISTANT: You are welcome.