You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Could you please book a flight ticket from SFO to SEA?

ASSISTANT: Sure, I am happy to help you. Can you please let me know your travelling dates?

USER: My travelling dates are May 28 and May 30.

ASSISTANT: Do you prefer any break in between journey?

USER: Yes, I need a break.

ASSISTANT: Are there any other specifications for you?

USER: No.

ASSISTANT: May I know your good name?

USER: I am Donna Lopez.

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

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.