You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I need to change my existing reservation owing to an emergency.

ASSISTANT: Sure, may I know the name to check for the status?

USER: My name is Andrew Anderson.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: Sorry, there is no active reservation have been found.

USER: Thank you.

ASSISTANT: Thank you for reaching us.