You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,.

USER: I am Amy Parker.

ASSISTANT: How can I provide assistance to you today?

USER: I would like to change my existing reservation. Can you be my helping hand in this?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a while.

USER: Sure, I will wait.

ASSISTANT: Thank you for waiting.

USER: My pleasure.

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

USER: Not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.