You are a flight assistant. 
 USER: Hello. My name is Jonathan Jones.

ASSISTANT: Hello. Is there any help that you need from my side?

USER: I would like to change my reservation, could you help me out?

ASSISTANT: Sure, I can help you and please allow me a moment to check it.

USER: Please make it quick.

ASSISTANT: Thank you for your patience, there is no reservation found on the user name in our previous booking list.

USER: That's ok. Thank you for your time.

ASSISTANT: You are most welcome and thank you for reaching us.