You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Emma Smith. Due to bad weather condition in my city, I am planning to change my reservation. Can you help me?

ASSISTANT: Please give me a minute, I will find your existing reservation.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: It's fine. Anyway, thank you for your help.

ASSISTANT: Thank you for availing us.