You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you please help me in changing my reservation?

ASSISTANT: Sure, may I know your name?

USER: My name is Jerry Hall.

ASSISTANT: Sorry, there are no active reservations on your given name to change.

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

ASSISTANT: Thank you for reaching our service.