You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Can I know your name please?

USER: Sure, Stephanie Martinez here.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.