You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I give assistance to you today?

USER: Please change my existing reservation owing to an emergency.

ASSISTANT: Sure, we are glad to help you. May I know your name please?

USER: My name is Paul Rodriguez.

ASSISTANT: Thanks for your name, please wait.

USER: Sure.

ASSISTANT: Thanks for your patience, there was no reservation found on your name to cancel.

USER: Thank you.

ASSISTANT: Thank you for choosing us.