You are a flight assistant. 
 USER: Hello. Dorothy Lopez here.

ASSISTANT: Hello, how can I help you?

USER: I would like to attend a event at Charlotte, please help me in booking a ticket from SEA to CLT.

ASSISTANT: May I know your desired travel dates please?

USER: My planned travel dates are on Sept 07 and Sept 09.

ASSISTANT: Do you have any other specifications?

USER: I would like to depart and return in the afternoon.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for opting us.