You are a flight assistant. 
 USER: Hello. George Taylor here.

ASSISTANT: Hello, this is flight booking agency. How may I help you?

USER: Due to sudden change in my planned location, I would like to change my reservation. Can you do this for me?

ASSISTANT: Sure, I will help you with the change of flight reservation.

USER: Thank you.

ASSISTANT: Wait for a minute please.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting patiently. But I regret to inform you that that there is no flight reservation on your name.

USER: Oh! I think something went wrong on that situation. Anyway, thank you for the information.

ASSISTANT: Ok, thanks for reaching us.

USER: Welcome.