You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Please share your name to proceed further?

USER: My name is Benjamin Adams.

ASSISTANT:  Benjamin Adams sorry, no reservation found in our database.

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

ASSISTANT: Thank you for choosing us.