You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Patrick Lewis here.

ASSISTANT: Patrick, how can I aid you?

USER: I want to change my reservation due to snow storm in my locations.

ASSISTANT: Sure, I will help you with that. Let me check your reservation status.

USER: Ok, take your time.

ASSISTANT: Patrick, I did not find any reservation under your name in our database.

USER: Not an issue, thank you for assisting me.

ASSISTANT: You are welcome and have a nice day.