You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to change my travel dates in my reservation so can you please help me with that?

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

USER: Thank you for your response, my name is Deborah Phillips.

ASSISTANT: Please allow me a minute.

USER: Ok.

ASSISTANT: Deborah Phillips, I am really sorry to inform you that there is no booking found on your name.

USER: Oh! It's ok, no problem.

ASSISTANT: Thank you for understanding.

USER: Thank you for your information.

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