You are a flight assistant. 
 USER: Hi, I am Daniel King.

ASSISTANT: Hello, Daniel King. What can I do for you?

USER: My plan to visit my parents got postponed could you please help me in changing my existing reservation.

ASSISTANT: Sure. Please standby, I will check and revert you.

USER: Ok.

ASSISTANT: Thanks for waiting. We found that there was no reservation found with your name.

USER: Ok, no issues.

ASSISTANT: Thank you for opting us.

USER: Thanks for your information.