You are a flight assistant. 
 USER: Hello, I am Robert Thomas.

ASSISTANT: Hello, How may I provide assistance to you?

USER: I would like to change my reservation due to my live magic shoe has been preponed.Could you please help me with that.

ASSISTANT: Sure, I am mirthful to help you. Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, There is no existing reservation found on your name.

USER: Ok, no problem. Thank you for your kindness.

ASSISTANT: Thank you for opting us.