You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Let me know your name to check your reservation?

USER: I am Angela Jackson.

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.