You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Paul Roberts here.

ASSISTANT: How can I aid you at this moment?

USER: I would like to change my reservation due to some personal issues, can you please help me out with that?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Ok, please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: There is no previous reservation available in your name.

USER: That's ok, no problem. Thank you for the information.

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