You are a flight assistant. 
 USER: Hello, I am Jessica Hill.

ASSISTANT: Hello. How may I support you today?

USER: I would like to change my existing reservation as my interview got postponed. Can you help me with it?

ASSISTANT: Sure, give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, we did not found any reservation by this name.

USER: It's ok, thank you for the information.

ASSISTANT: Thanks for opting us.