You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: As my schedule to meet manager got postponed, I want to change my reservation. Can you please help me?

ASSISTANT: Sure, I will help you with that. To proceed further, May I know the name?

USER: I am Richard Lee.

ASSISTANT: OK, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting. I have checked in reservation list to change your ticket, but could not find any reservation with your name.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for opting us, Have a great day!.