You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Laura Walker.

ASSISTANT: How can I assist you?

USER:  Will you please assist me in change my reservation as the invitation which I got to attend for music festival got postponed?

ASSISTANT: Sure, I am here to aid you.

USER: Thank you.

ASSISTANT: Wait a minute please.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry to say no reservation found on your name.

USER: No issues. Thank you.

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