You are a flight assistant. 
 USER: Hello, I am Eric Lewis.

ASSISTANT: Hello, how may I help you today?

USER: Owing to an emergency, I want to change an existing reservation, so please help me in changing the reservation.

ASSISTANT: Sure, please hold on a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation was found on the name of Eric Lewis.

USER: Not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you.