You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

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

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

USER: My name is Donald Garcia.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: Thank you for your time, sorry no reservation found on your name.

USER: That's ok, thank you.

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