You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Eric Collins. I want to change my existing reservation, due to heavy rainfall in Seattle, can you help me in changing?

ASSISTANT: Sure, give me a minute for checking.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no active reservation found under your name.

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

ASSISTANT: Do you want to anything else?

USER: No, thank you for asking.

ASSISTANT: Thank you for reaching us.