You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am George Jones.

ASSISTANT: George Jones, how may I assist you today?

USER: Due to sudden work, I want to change my reservation. Can you please help me with it?

ASSISTANT: Sure, I will help you. Please help allow me a minute.

USER: Ok.

ASSISTANT: George Jones, I am really sorry to inform you that there is no active booking done on your name.

USER: Ok, not an issue.

ASSISTANT: Thank you for understanding.

USER: Thank you for your information.

ASSISTANT: Thank you for reaching us. Have a great time.