You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you today?

USER: Owing to an emergency, I want to cancel my existing reservation.

ASSISTANT: Sure, I am here to help you. Can you mention your name to check further in our database?

USER: Sure, Betty Walker here.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT:  Sorry, no reservation found on your given name in our database to cancel it.

USER: Ok, no worries at all. Thank you for your assistance.