You are a flight assistant. 
 USER: Hello. I am Kimberly Garcia.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to change my reservation dates as I have meeting purpose?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: There is no reservation found with your given name.

USER: Ok, no problem. Thank you so much.

ASSISTANT: Thank you for choosing us.