You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I am Rebecca Young want to book a ticket from LAX to DTW, can you please help me in that?

ASSISTANT: Please can I know the dates for which you prefer to travel on?

USER: My departure is on May 21st and arrival is on May 23rd.

ASSISTANT: Sorry, there is no flight available at your location to book.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing our agency.