You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

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

ASSISTANT: How may I help you?

USER: I want to cange my dates of existing reservation.

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: I am Stephanie Carter.

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

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.