You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Actually my business meeting has been postponed so I want to change my existing reservation. Can you please help me?

ASSISTANT: Sure. Please provide me your name to proceed further.

USER: Myself Kevin Lopez here.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Kevin, there is no reservation found with your details.

USER: No problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.