You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Shirley Martinez here. I would like to change my reservation due to heavy rainfall at my destination location, can you please help me out?

ASSISTANT: Sure, please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there was no reservation found with your given name.

USER: That's ok, no problem. Thank you for checking out.

ASSISTANT: Thank you for opting us.