You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: Owing to an emergency, I want to change my existing reservation.

ASSISTANT: Sure, I can change your reservation right now. Before that I need to know your good name please?

USER: Sure, Emily Anderson here.

ASSISTANT: Ok, please wait a minute I will get back to you with the present status.

USER: Sure.

ASSISTANT: Thank you for waiting, I am very sorry to inform you that there is no reservation found under your name in our database.

USER: Ok, no issues at all. Thank you for your information.

ASSISTANT: Thank you for availing us.