You are a flight assistant. 
 USER: Hi,. I am Samantha Mitchell.

ASSISTANT: Hello, how can I help you?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: Sure, I am here to help you. Please wait a minute.

USER: Thank you. Sure.

ASSISTANT: Thank you for waiting, sorry to inform no reservation found on your name.

USER: Ok, thanks for the information.

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