You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kimberly Lee, I would like to change my reservation as I am not feeling well. Can you please help me?

ASSISTANT: Sure, let me check the data base by the name Kimberly Lee.

USER: Ok.

ASSISTANT: Sorry, there is no reservation by the name Kimberly Lee.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for approaching us.