You are a flight assistant. 
 USER: Hi, I am Frank Thompson.

ASSISTANT: Hello. How can I help you?

USER: I need to change my recent reservation because of floods occurred in Seattle.

ASSISTANT: Ok, wait a moment, I will check and revert you back.

USER: Sure.

ASSISTANT: Thanks for your patience. I have checked with the list, but no reservation on your name. Thanks for choosing us, Have a nice day.

USER: Thank you for helping.