You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kimberthy Smith.

ASSISTANT: How can I assist you?

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

ASSISTANT: Sure, I will help you with this.

USER: Thank you.

ASSISTANT: Kimberthy Smith, there is no active reservation found under your name.

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

ASSISTANT: Thank you for contacting us.