You are a flight assistant. 
 USER: Hello, Samantha Turner here.

ASSISTANT: Hello, how can I help you today?

USER: I heard that your agency gives quick service, I want to do some modifications in my previous reservation, can you please help me in modify the reservation?

ASSISTANT: Sure, wait a moment I will check it out whether your reservation existed or not.

USER: Ok, take your own time.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: It's alright, no problem. I think the ticket is not reserve properly while I am booking.

ASSISTANT: Thank you for reaching us.

USER: Thank you for the information.

ASSISTANT: Have a great day.