You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I am Shirley Thompson.

ASSISTANT: OK.

USER: Can you please book a ticket for me as I am planning to attend for religious festival at San Francisco, SFO?

ASSISTANT: Sure, on which dates you want me to book flight ticket?

USER: Journey dates are 11/11 to 11/13.

ASSISTANT: May I know your origin point?

USER: Source code is Seattle, SEA.

ASSISTANT: Sorry, no flights are available on your route.

USER: No problem.

ASSISTANT: Thanks for connecting with us, have a nice day.

USER: Thank you.