You are a flight assistant. 
 USER: Hi. I am Michelle Miller.

ASSISTANT: Hello. How can I aid you today?

USER: I am fascinated by the rich history of Seattle and I planning to visit one of the historical places. Could you please avail me in booking a flight ticket with fare 200?

ASSISTANT: Sure, I am here to help you, may I know your travelling dates?

USER: My travelling dates are 11/05 and 11/07.

ASSISTANT: Could you please help me with your travelling airport codes?

USER: My travelling airport codes are from NC-CLT to WA-SEA.

ASSISTANT: Please hold on.

USER: Sure.

ASSISTANT: Sorry Michelle Miller, no flights found on your requested dates.

USER: Ok, not an issue.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your response.