You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I am Barbara Evans. I want to change my existing reservation due to heavy rainfall, can you please help me?

ASSISTANT: Sure, I am happy to help you with that.

USER: Thank you.

ASSISTANT: Wait for a minute.

USER: Sure.

ASSISTANT: We are great to say that, there is no reservation found on your name in our records.

USER: Ok, no problem. Thank you for your help.

ASSISTANT: Thank you for reaching us.