You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, may I know your name to check your ticket from our database.

USER: I am Jacob Robinson.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: We regret to inform you that there is no active reservation found on your name to cancel.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for contacting us.