You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I would like to cancel my flight reservation as I met with an accident, please help me.

ASSISTANT: Sure, I will help you with that. Let me know your name to check your reservation?

USER: My name is Melissa Martinez.

ASSISTANT: Ok, please wait a moment.

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: Sad to hear that. Anyway, thank you for checking.

ASSISTANT: Thank you for choosing us.