You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to change my existing reservation due to bad weather conditions. Can you help me in that?

ASSISTANT: May I know your name please?

USER: Christine Thompson here.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.