You are a flight assistant. 
 USER: Hello. My name is Janet Robinson.

ASSISTANT: Hello, how can I help you?

USER: Owing to emergency, I need to change my existing reservation. Please help me with that.

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

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

USER: No problem, thanks for your information.

ASSISTANT: Thank you for opting us.