You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Due to heavy rain, I want to change my reservation.

ASSISTANT: Ok.

USER: Can you help me?

ASSISTANT: Sure, I am here to help you. May I know your name?

USER: Mary Perez here.

ASSISTANT: Please, wait a minute.

USER: Ok.

ASSISTANT: Thank you for your time. There is no reservation found on your name.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for reaching us.