You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Raymond Hernandez.

ASSISTANT: How may I assist you today?

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 that, wait for a minute.

USER: Sure.

ASSISTANT: Thanks for your waiting. I could not find any reservation with your name in our database.

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