You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I render you at this moment?

USER: I want to reschedule my recent reservation dates as my plan to go for an private helicopter tour got postponed. Can you change my reservation made by the name Kenneth Garcia?

ASSISTANT: Sure, please wait for few minutes, let me check with your existing reservation status.

USER: Sure, I will be waiting for your response.

ASSISTANT: There is no existing reservation found on your name in our records.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thank you for opting us.