You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: My name is Patrick Parker. Owing to emergency, I need to cancel my recent reservation. Please help me with that.

ASSISTANT: Sure, please wait for a while.

USER: Sure.

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

USER: No problem, thanks for your information.

ASSISTANT: Thank you for opting us.