You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I render you today?

USER: Owing to an emergency I had to request for this change reservation.

ASSISTANT: Sure, may I know your good name?

USER: My name is Angela White.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: I have checked in reservation list to change your ticket, but could not find any reservation with your name.

USER: Thanks.

ASSISTANT: Thank you for reaching us.