You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: Owing an emergence, I want to change my recent reservation. Can you help me with it?

ASSISTANT: Sure, I will help you with that. May I know your name to check your details in our database?

USER: My name is Sarah Rodriguez.

ASSISTANT: Please wait a while.

USER: Ok.

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

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thanks for the help.