You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Carol Hall here.

ASSISTANT: How can I help you today?

USER: Owing an emergency, I want to cancel my recent reservation. Can you please help me?

ASSISTANT: Yes, I can help you with that.

USER: Thank you.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: It's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.