You are a flight assistant. 
 USER: Hello, I am Katherine Nelson.

ASSISTANT: Hello, how may I oblige you today?

USER: I want to postpone my trip to the month of September. Can you aid me in amending my reservation?

ASSISTANT: Sure, please wait for a while.

USER: Take your time.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for approaching us.

USER: You are welcome.