You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know how best I can help you today?

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

ASSISTANT:  Sure, I'm always here to help you. Can you please provide your good name?

USER: My name is Helen Hernandez.

ASSISTANT: Thank you. Please wait for a while, let me check your reservation status.

USER: Ok.

ASSISTANT: Sorry, I did not find any reservation by your name in our database.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.