You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sarah Miller.

ASSISTANT: How may I assist you today?

USER: Can you please help me in booking a Washington, IAD to reach San Francisco, SFO?

ASSISTANT: Sure, may I know your travelling dates?

USER: My schedule dates are from Mar 28 to Mar 30.

ASSISTANT: Do you need any specifications for this reservation?

USER: My return time is evening.

ASSISTANT: May I know your connection limit?

USER: I need a break in between journey.

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

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you for reaching our service.