You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Paul Scott.

ASSISTANT: How could I help you?

USER: Can you help me for changing my existing reservation?

ASSISTANT: Sure, I will definitely help you in changing your ticket reservation.

USER: Thank you.

ASSISTANT: Please let me check with that one.

USER: OK.

ASSISTANT: Thank you for your patience, there is no active reservation done on the name which you have given us to check.

USER: Oh! It's ok no problem, thank you for your services.

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