You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Sarah Rodriguez, I need to change my reservation as my plan to visit Houston is postponed. Help me to change my reservation with new date.

ASSISTANT: Sure, please stand by I will revert you.

USER: Sure.

ASSISTANT: Thank you for waiting, no reservation found with your name.

USER: Thank you for the information.

ASSISTANT: Have a nice day.