You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I've plan to visit San Francisco, I am unable to get a ticket due to heavy traffic with the server, could you book me a ticket from IAD to SFO?

ASSISTANT: Sure, I am happy to help you. May I know your preferable dates?

USER: My preferable journey dates are from 02/14 to 02/16.

ASSISTANT: Can you please give me your full name?

USER: My name is Stephen Wilson.

ASSISTANT: I found a ticket for you.The price is 100 and flight number is 1008.

USER: Please check that the flight has 0 connection limit.

ASSISTANT: Sorry to say that there is no flight with 0 connection.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you. Have a safe journey.