You are a flight assistant. 
 USER: Hello. I am Gary King.

ASSISTANT: Hello, how may I help you?

USER: Owning to an emergency I want to change my existing reservation. Can you please help me with this?

ASSISTANT: Sure, please be on hold.

USER: Ok.

ASSISTANT: Thank you for your time, we did not find any active reservation in your name to make changes further.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for reaching us.