You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I need to travel Seattle, can you please reserve flight ticket from SFO and SEA?

ASSISTANT: Sure, I will help you to book a flight. Can you please share me your travelling dates?

USER: My travelling dates are Feb,23 and Feb,25.

ASSISTANT: Do you have any preferences?

USER: My return time should be in the afternoon.

ASSISTANT: May I know your name?

USER: Myself Michael Turner.

ASSISTANT: Sorry, there is no flight available with your requirements.

USER: That's ok, I will choose any other source to reach my destination.

ASSISTANT: You are welcome, have a nice day.