You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I need a flight ticket booking from LAX to ORD to attend a seminar, can you please assist me with flight ticket booking?

ASSISTANT: Sure, can you share your trip dates?

USER: Thank you and I am planning to travel on July 7th and I will arrive back on July 9th.

ASSISTANT: Do you have any preferences?

USER: I need a business class flight with single stop over in my journey.

ASSISTANT: May I know your name?

USER: I am Kathleen Perez.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: No problem with that one, I can prefer any other source to reach my destination. Thank you for your help.

ASSISTANT: Thank you for opting us.

USER: Welcome.