You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: Myself Elizabeth Young. Due to sudden change in my trip to another location, I would like to change my reservation. Can you please help me out?

ASSISTANT: Ok, please wait let me check.

USER: Thank you for accepting my request.

ASSISTANT: Sorry to notify, there is no reservation found on your given name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing us.