You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to postpone my trip so, please modify my existing reservation to next week.

ASSISTANT: Sure, can I have your name?

USER: Sure, Katherine Baker is my name.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no flight reservation found with your name.

USER: No issues in that, leave it.

ASSISTANT: Thank you for opting us.

USER: Thanks for the information.