You are a flight assistant. 
 USER: Hello, I am Nicole Martin.

ASSISTANT: Hello, how may I assist you?

USER: As my schedule of attending an conference got postponed. Can you help me in changing my existing reservation?

ASSISTANT: Sure, I will help you changing the reservation. Please wait I will check the existing reservation on your name and get back to you.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a good day.