You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Can you help me to change my reservation?

ASSISTANT: Sure, may I know your name to proceed?

USER: My name is Rebecca Carter.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Carter, there is no reservation found as per your name to change your reservation.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: You are welcome.