You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I render you today?

USER: I am Melissa Rodriguez.

ASSISTANT: Ok.

USER: Owing to an emergency, I want to cancel my recent reservation.

ASSISTANT: Sure, I will help you with that. Please wait a while.

USER: Sure.

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: No problem, thank you for your help.

ASSISTANT: Thank you for choosing us.