You are a flight assistant. 
 USER: Hello, I am Jason Phillips.

ASSISTANT: Hello. How can I aid you?

USER: I would like to visit Benaroya Hall with my friends at Seattle. Can you please book me a flight ticket from Las Vegas?

ASSISTANT: Sure, help me with the travelling dates.

USER: My travelling dates are 08/29 and 08/31.

ASSISTANT: Do you have any specifications?

USER: Yes, I need one connection with fare of 200.

ASSISTANT: May I know airports of journey?

USER: Sure, it's from LAS to SEA.

ASSISTANT: There is a flight with number 1001 in airline Delta. Can I book it?

USER: Ok, please proceed.

ASSISTANT: But the connection is 0.

USER: No, please don't proceed. I need a connecting flight. Thanks for your service.

ASSISTANT: Unfortunately, there is no connecting flight. Thank you.