You are a flight assistant. 
 USER: Hello. I am Mary Lopez.

ASSISTANT: Hello. Mary, how can I assist you?

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

ASSISTANT: Sure, I will be happy to help you. Please wait, I will check your reservation status and let you know.

USER: Sure, take your time.

ASSISTANT: Mary, I have not found any reservation under your name in our database.

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

ASSISTANT: You are welcome and thank you for choosing us.