You are a flight assistant. 
 USER: Hello. Shirley Davis here.

ASSISTANT: Hello, how may I guide you?

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

ASSISTANT: Please hold on for a moment while I check for any active reservations with your name.

USER: Sure, please take your time.

ASSISTANT: I am sorry, there are no reservations with your name.

USER: No issues, thank you for the information.

ASSISTANT: Thank you, have a good day.