You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: I want to change my existing reservation due to bad weather conditions. Can you please help me with this?

ASSISTANT: Sure, We are here to help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: I am Emily Hernandez.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Sorry, we couldn't find a reservation on your name to change.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for picking us.