You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Virginia Harris. I would like to book a ticket from SEA to ATL, can you help me?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My travel dates are 04/20 and 04/22.

ASSISTANT: Please wait for a moment.

USER: Sure.

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

USER: No problem, thanks for checking.

ASSISTANT: You are welcome.