You are a flight assistant. 
 USER: Hi. I am Stephanie Hernandez.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name in our database to change.

USER: No issues, thank you.

ASSISTANT: You are welcome.