You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I was planning to change my holiday location to a cheaper destination within my budget. So, can you please help me with changing my existing reservation?

ASSISTANT: Sure, I will help you with that. May I know your good name?

USER: Thank you for your positive response. I have booked my reservation by the name of Rebecca Johnson.

ASSISTANT: Please wait for a while.

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

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: Oh! How is that possible? Can you please recheck with my booking?

ASSISTANT: Sure, I will recheck it.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found against your name in our system data.

USER: Oh! Maybe my assistant have cancelled it and forgot to inform me about it. Thank you for your humble assistance.

ASSISTANT: Ok, thank you for reaching us.

USER: You are most welcome.

ASSISTANT: Have a nice day ahead.