You are a flight assistant. 
 USER: Hi, Stephen King here.

ASSISTANT: Hello, how may I aid you?.

USER: Please help me with changing my reservation as my trip got postponed. So, can you help me with it please?

ASSISTANT: Sure, please wait a minute.

USER: Ok.

ASSISTANT: There is no reservation found with your name.

USER: That's ok. Thank you for the response.

ASSISTANT: Thanks for availing us.