You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: Can you please help me with changing my recent reservation?

ASSISTANT: Sure, I am here to help you. May I know your good name please?

USER: My name is Sandra Moore.

ASSISTANT: Ok, please give me a minute.

USER: Ok.

ASSISTANT: Thanks for your presence. Unfortunately, there is no reservation found on your given name.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thanks for availing us.