You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: I need to do some project in Botanical Gardens, but having some health issues I want to postponed it. Please help me in changing the reservation.

ASSISTANT: Sure, I will help you.

USER: Ok.

ASSISTANT: May I know your name?

USER: The earlier reservation was made with the name of Lisa Wright.

ASSISTANT: Ok,Please wait a moment.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry, there is no active reservation on your name.

USER: Ok, thank you for your response.

ASSISTANT: Thank you.