You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Karen Hall.

ASSISTANT: Hall, how may I aid you?

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

ASSISTANT: Please give me a moment to check your ticket status.

USER: Sure, I will wait for your reply.

ASSISTANT: Sorry, no reservation is found by your name.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for reaching us.