You are a flight assistant. 
 USER: Hi. I am Shirley Clark.

ASSISTANT: Hello. How can I help you?

USER: i want to change my reservation as my get together program got postponed. Can you help me in changing?

ASSISTANT: Sure, I will help you. Please wait.

USER: Ok.

ASSISTANT: Thanks for waiting. There is no reservation found on your name.

USER: That's alright, thanks for your assistance.

ASSISTANT: Thank you.