You are a flight assistant. 
 USER: Hello. I am Rebecca Carter.

ASSISTANT: Hello, how can I assist you for the day?

USER: I am planning to attend music concert at LAX, can you please help me with booking a flight ticket from ORD?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: Sure, I would like to take off on Sept 13 and return on Sept 15.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.