You are a flight assistant. 
 USER: Hi. I am Deborah Lee.

ASSISTANT: Hello, How may I help you today?

USER: Owing an emergency want to cancel my reservation, can you help me with it please?

ASSISTANT: Sure, I will help you with that.

USER:    Thank you.

ASSISTANT: Please wait a while.

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: That's fine, thank you for the response.

ASSISTANT: Thank you for choosing us.