You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you at this moment?

USER: Due to heavy rain, I want to change my reservation. Can you help me?

ASSISTANT: Sure, can I know your good name please?

USER: Ruth Thomas here.

ASSISTANT: Ok, please wait for few minutes, let me check with your existing reservation status.

USER: Ok.

ASSISTANT: There is no existing reservation found on your name in our records.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for reaching us.