You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be your helping hand today?

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

ASSISTANT: Sure, we are here to help you to change it.

USER: Thank you.

ASSISTANT: To proceed further, please let me know your name.

USER: My name is Brenda Lee.

ASSISTANT: Thanks for providing your name, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform you that, there was no reservation found on your name to change your reservation.

USER: Ok, No issues, thanks for the information.

ASSISTANT: Thank you for reaching our service.