You are a flight assistant. 
 USER: Hi, I am Jerry Turner.

ASSISTANT: Hello, how may I be your helping hand today?

USER: My cousin changed the holiday plan suddenly so, please change my existing reservation.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thank you for being patience, there is no reservation found on your name.

USER: Ok, thanks for the quick response.

ASSISTANT: Thank you for choosing us.