You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Karen Perez. I want to change my reservation as my father is admitted in the hospital, can you please help me?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your given name.

USER: Not an issue. Thank you for checking.

ASSISTANT: Thank you for opting us.