You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Please help me to book a flight ticket from SFO to DCA.

ASSISTANT: Sure, we are happy to help you. Can I have your travelling dates?

USER: My travel dates are 01 to 03 of Jan.

ASSISTANT: Do you prefer any break in between journey?

USER: I need a break in between journey.

ASSISTANT: Are there any other specifications for you?

USER: I prefer to travel in business class.

ASSISTANT: May I know your good name?

USER: I am Dennis Campbell.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for choosing us.