You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I amend you today?

USER: Please change my existing reservation reserved on my name, As I need to attend the meeting with my client at journey day. Can you change my reservation?

ASSISTANT: Sure, may I know your name?

USER: Samuel Smith, is my name.

ASSISTANT: Sorry Samuel Smith, no reservation found on your name.

USER: Ok, I will try to check with another airlines.

ASSISTANT: Thank you for approaching us.

USER: Thanks for your information.