You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patrick Lee.

ASSISTANT: How can I assist you today?

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

ASSISTANT: Sure, I am here to help you out. Please wait a moment while I check.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting for my response. Sorry, there is no reservation been found on your name to change.

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

ASSISTANT: Thank you for choosing our agency.