You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

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

ASSISTANT: Sure, I am here to help you with this.

USER: Thank you.

ASSISTANT: Can you please provide your name to check your reservation status?

USER: Sure, my name is Carolyn Hill.

ASSISTANT: Wait a moment please.

USER: Ok, sure.

ASSISTANT: Carolyn Hill, there is no active reservation found under your name in our database.

USER: Ok, no issues. Anyways, thank you for the information.

ASSISTANT: Thank you for contacting us.