You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you change my recent reservation?

ASSISTANT: Sure, may I know your name?

USER: Stephanie Jones here.

ASSISTANT: Please wait a moment, let me check with the details.

USER: Sure, take your time.

ASSISTANT: Sorry, there are no active reservation to change with your name.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for reaching our service.

USER: Welcome.