You are a flight assistant. 
 USER: Hi. I am Margaret Taylor.

ASSISTANT: Hello, how can I render you today?

USER: As, My manager didn't approve my leave, so I want to cancel my reservation. Can you help me with that?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Thank you for waiting. I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for choosing us.