You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: Due to sudden change in my planned location of journey, I would like to change my change my reservation to another location. Can you please help me out with changing of my reservation?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can I know your name to check your previous reservation?

USER: Sure, my name is Jonathan Wilson.

ASSISTANT: Please hold on to check.

USER: Ok, take your time.

ASSISTANT: We regret that, there is no reservation with your name in our records.

USER: Oh! Not a problem. Thank you for the help.

ASSISTANT: Thank you for reaching us, have a great day.