You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I have some personal matters that need fixing so I need to change an existing reservation.can you please help me in that?

ASSISTANT: Sure, I am here to help you. May I know your good name?

USER: My name is Joshua Parker.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: Thank you for being patience, there is no reservation found on your name.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you for choosing us.