You are a flight assistant. 
 USER: Hello, I am Jennifer Roberts.

ASSISTANT: Hello. How can I help you?

USER: I want to reach DC - DCA  from DC - IAD to exhibit my paintings in art gallery. Can you help me in booking?

ASSISTANT: Sure, may I know the travelling dates?

USER: Yes, my journey dates are from 10/05 to 10/07.

ASSISTANT: Sorry, there is no flight on your requested dates.

USER: That's Ok.

ASSISTANT: Is there anything else I can help you with?

USER: Thanks for your assistance. No, I am fine with it.

ASSISTANT: Welcome.