You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: Can you help me to change my reservation to next week?

ASSISTANT: May I know your name?

USER: My name is Kimberly Garcia.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: That is fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.