You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kevin Carter.

ASSISTANT: How can I help you?

USER: I want to change my reservation, due to heavy rainfall in Seattle, can you help me?

ASSISTANT: Sure, please wait for a minute. Kevin, there is no reservation found with your details.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for choosing us.