You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I amend you?

USER: Samantha Moore here, want your help in making some changes in my existing reservation due to the busy schedule on my previously planned dates.

ASSISTANT: Sure, I will help you in this.

USER: Thank you.

ASSISTANT: Ok, just wait for a while I will revert to you.

USER: Sure, I will be waiting.

ASSISTANT: Sorry, we found no reservation in your name to change the details as per your request.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for opting us.