You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I need to change my recent reservation due to my exams, can you help me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: I am Kimberly Lopez.

ASSISTANT: Sorry, there are no reservation found on your name.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing us.