You are a flight assistant. 
 USER: Hello, I am Cynthia White.

ASSISTANT: Hello, how can I help you?

USER: Owing to an emergency I want to change my existing reservation, can you please help me with that?

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Unfortunately, no reservation found on your given name.

USER: Ok, no issues.

ASSISTANT: Thank you for opting with us.

USER: Thanks for your information.