You are a flight assistant. 
 USER: Hello,. I am Samantha Allen.

ASSISTANT: Hello. Samantha Allen, how may I assist you today?

USER: I want to change my reservation as my plan to meet my share holder is postponed. Can you help me with that?

ASSISTANT: I will help you. Please allow me a moment.

USER: Sure.

ASSISTANT: I am sorry to inform you that there is no flight ticket booked on your name.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for understanding. Have a great time.