You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Sandra Taylor. I want to change my reservation due to my interview got postponed.

ASSISTANT: Sure, please wait I will let you know.

USER: Sure.

ASSISTANT:  Sorry, no reservation found on your name.

USER: Ok, not an issue. Thank you for your help.

ASSISTANT:  Thank you for availing us.