You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how  may I help you?

USER: I would like to change my reservation as I am leaving for delegates meet, can you please help me out?

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

USER: Paul Gonzalez here.

ASSISTANT: Please wait for a while, let me check your reservation status in our database.

USER: Sure.

ASSISTANT: Sorry to intimate that, no reservation is found with your credentials.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you very much for contacting our agency.