You are a flight assistant. 
 USER: Hello, I am Stephen King.

ASSISTANT: Hello, how may I help you today?

USER: I want to reschedule my recent reservation as my plan for an adventure trip in Phoenix got postponed. Can you help me in changing?

ASSISTANT: Sure, I will help you to change your reservation. Please wait, while I check for the reservation on your name.

USER: Ok.

ASSISTANT: Thanks for waiting, Sorry Stephen King, there is no any reservation found on your name in our system data.

USER: That's Ok, I may go by any other transport. Thanks for your response.

ASSISTANT: Thanks for reaching us, have a nice day ahead.