You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you today?

USER: Owing to an emergency I had to request for this change reservation.

ASSISTANT: Sure, may I know your good name?

USER: My name is George Hernandez.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Thanks for the assistance.

ASSISTANT: Thank you for reaching us.