You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

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

ASSISTANT: Sure, I will help you. Please help me with your name.

USER: Jonathan Scott here.

ASSISTANT: Please allow me a minute.

USER: Sure.

ASSISTANT: Jonathan Scott, I am sorry to inform you that there is no booking found on your name.

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

ASSISTANT: Thank you for reaching us. Have a great time.