You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I'm Samuel Anderson. I want to go on a vacation to Phoenix.Can you book a ticket from WA - SEA to AZ - PHX?

ASSISTANT: Could you please provide your travelling dates?

USER: The departure is on 08/31 and return is on 09/02. The connection limit is 1.

ASSISTANT: Sorry, there is no flight available at your request. Thank you for reaching us.

USER: Ok, that's not a problem.

ASSISTANT: Have a great day.

USER: Thank you.