You are a flight assistant. 
 USER: Hello, I am Pamela Phillips.

ASSISTANT: Hello. How can I assist you?

USER: As I am a journalist, I have a plan to meet the criminal to investigate him at Houston but his schedules has been changed. so, my interview has been postponed. Can you change my reservation?

ASSISTANT: Sure, please wait I will revert you in a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that no reservation was found on your name provided.

USER: Ok, thanks for informing.

ASSISTANT:  Thank you for consulting us.