You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Jerry Smith. I would like to change my reservation as I am leaving for semester exams, can you please help me out?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there is no reservation found on your name.

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

ASSISTANT: Thank you for reaching us.