You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How may I help you?

USER: I am Susan Roberts. I want to change my reservation as my plan to meet my share holder is postponed. Can you help me with that?

ASSISTANT: Give me a moment please.

USER: Sure.

ASSISTANT: Thanks for your time, there is no reservation found on your name to change it.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thanks for choosing us.