You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can help you today?

USER: My brother has invited to attend his convocation day at Seattle. Can you help me in booking a ticket from ATL?

ASSISTANT: That's great. I will help you with booking. Which airport do want to reach in Seattle?

USER: Its SEA.

ASSISTANT: Do you have planned any particular dates o travel?

USER: Yes, I am planning to travel on 11/29 and return on 12/01.

ASSISTANT: That's fine. Please be hold on for a moment to check flight availability.

USER: Sure.

ASSISTANT: I should appreciate your patience. Sorry for the inconvenience, there is no flight available to you on your dates.

USER: That's fine. I will find other way. Thank you for the information.

ASSISTANT: Thank you for choosing us. Have a good day.

USER: You are welcome.

ASSISTANT: May I know your good name?

USER: My name is Margaret Lopez.

ASSISTANT: Thank you Lopez.