You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know how best I can help you today?

USER: This is Ruth Garcia, can you help me to book a flight ticket from EWR to SFO?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: My preferable journey dates are Mar 21 and Mar 23.

ASSISTANT: May I know your departure time and arrival time?

USER: I would like to depart in the evening and return in the morning.

ASSISTANT: Do you have any other requirements?

USER: I prefer connecting flight for this trip.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: No problem, thank you for the information.

ASSISTANT: Thank you.