You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me with changing my reservation due to my planned event got shifted to another location?

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

USER: Sure, myself James Taylor.

ASSISTANT: Sorry, unfortunately there is no reservation found on your name to change.

USER: Oh! May be booking is not done properly. Anyway, thank you for your valuable time.

ASSISTANT: Thank you for approaching us.

USER: Most welcome.