You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I oblige you today?

USER: Owing to an emergency, I just need to change my existing reservation. Can you please help me to change it?

ASSISTANT: Sure, we are here to help you.

USER: Thanks for considering my request.

ASSISTANT: Can you please provide me your good name?

USER: Sure, please check my reservation on the name of Stephanie Carter.

ASSISTANT: Please hold a moment, while I check the recent reservation under your name.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no active reservation found with the given name.

USER: That's Ok, thanks for your information.

ASSISTANT: Thank you for contacting us.