You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Due to bad weather conditions, I would like to change my existing reservation. Can you help me with that?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: I am Richard Miller.

ASSISTANT: Ok, please wait a minute.

USER: Sure, I will wait.

ASSISTANT: Sorry Richard, there is no reservation found under your name in our records.

USER: It's ok, thank you for the information.

ASSISTANT: Most welcome.