You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to change my reservation because of some tornado going on my destination location. Can you help me changing the reservation?

ASSISTANT: Sure, I will help you with that. Give me a minute, I will get back with your details. I am sorry to say that there is no reservation found. May I know your name please?

USER: Myself Steven Moore. Thank you for your information.

ASSISTANT: Thank you for contacting us.

USER: Welcome.