You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Patrick Thompson.

ASSISTANT: Thompson, how can I assist you?

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

ASSISTANT: Sure, I am here to help you. Let me check your reservation status.

USER: Sure.

ASSISTANT: Thompson, I did not find any reservation under your name.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for contacting us and have a nice day.