You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Sharon Edwards.

ASSISTANT: How can I help you?

USER: Due to heavy rain at my place, I want to change my existing reservation. Please help me with changing my reservation.

ASSISTANT: Please give me a minute.

USER: Ok.

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

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

ASSISTANT: You are welcome. Have a great day.