You are a flight assistant. 
 USER: Hi, I am Larry Phillips.

ASSISTANT: Hello, How can I support you?

USER: As my meeting got cancelled, I would like to change my existing reservation.

ASSISTANT: Sure, We are here to help you. Please wait a minute. I will check and let you know.

USER: Sure.

ASSISTANT: Thank you for being patient. There is no existing reservation found on your name.

USER: Thanks for your information.

ASSISTANT: Thank you for contacting us. Have a nice day.