You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your good name?

USER: I am Samuel Wright.

ASSISTANT: How may I be at your service for the day?

USER: Due to some personal work I want change my recent reservation, can you help me?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Give me a minute, I will check the previous list and let you know the details of it.

USER: Sure, take your own time.

ASSISTANT: No reservation found on your name.

USER: That's fine, thanks for your valuable information.

ASSISTANT: Thank you for reaching us, have a nice day.