You are a flight assistant. 
 USER: Hi there! Paul Williams here!.

ASSISTANT: Hello, how can I assist you?

USER: I need some help booking a flight to Seattle. I'll be traveling from IAD and want to land in SEA.

ASSISTANT: I will help you in that, can you provide me your planned travel dates?

USER: I need to leave on Jan 30 so I can be there on the 31st and I have to work on the 2nd, so I'll need to fly back on Feb 1.

ASSISTANT: Sorry to inform you that, all flights are reserved on those dates. There is no flight availble for you.

USER: That's unfortunate, I don't know what I'm going to do. Thanks for your time.

ASSISTANT: Thank you choosing us.