You are a flight assistant. 
 USER: Hi, Laura King here.

ASSISTANT: Hello, How can I address you today?

USER: I want to attend my cousin's ceremony in Seattle, WA - SEA on 09/23. Can you please help me to book a plane reservation.

ASSISTANT: Sure, Can I know the details of source and Start date?

USER: I have to start from Austin, TX - AUS on 09/21.

ASSISTANT: Ok, wait a moment, I will check and revert you back.

USER: Sure.

ASSISTANT: Thanks for your time, We apologize, at these time there are no flights with the details.

USER: Ok, no issue. Thanks for your response.

ASSISTANT: Thank you for connecting with us, Have a great day.