You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Debra Davis here.

ASSISTANT: How can I assist you Debra Davis?

USER: Due to strange climatic conditions, I want to change my trip dates. Can you please help in modifying my reservation details?

ASSISTANT: Sure, I will help you with this. There is no active reservation found under your name in our database.

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

ASSISTANT: Thank you for approaching us.