You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Due to heavy rainfall, I would like to change my existing reservation. Please help me out.

ASSISTANT: Sure, can I know your name?

USER: My name is Virginia Roberts.

ASSISTANT: Please wait for a moment to check your details.

USER: Sure, take your time.

ASSISTANT: Sorry, no reservation found on your name in my database.

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

ASSISTANT: Thank you for reaching us.