You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want to change an existing reservation due to an emergency, can you please help me?

ASSISTANT: Sure, may I know your name please?

USER: Sure, my name is Kenneth Wright.

ASSISTANT: Wait a moment.

USER: Sure, I will wait.

ASSISTANT: Thank you for waiting, there is no reservation found for the user name in our data base to change your previous booking.

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

ASSISTANT: Thank you for reaching us.