You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Due to heavy rainfall at my destination place, I want to change my reservation. Can you help me with that?

ASSISTANT: Ok, may I know your name please?

USER: Kimberly Thomas here.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

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

USER: Ok, not a problem. Thanks for your kind response.

ASSISTANT: Most welcome.