You are a flight assistant. 
 USER: Hello. I am Amy Clark.

ASSISTANT: Hello, how can I assist you?

USER: As my scheduled interview has been postponed, I need to change my existing reservation.

ASSISTANT: Ok.

USER: Can you please help me in changing my 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: It's ok, thank you for the information.

ASSISTANT: Thank you for opting us.