You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Can you help me to change my recent reservation because my trip dates are got postponed, can you help me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please help me with your good name.

USER: I am Kimberly Collins.

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

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us.