You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I want your help in making some changes in my existing reservation, due to the busy schedule on my previously planned dates.

ASSISTANT: Sure, I am here to help you. May I know your good name?

USER: Sure, I am Jack Perez.

ASSISTANT: Please wait for a moment.

USER: Ok, I will wait.

ASSISTANT: Sorry, we found no reservation on your give name.

USER: Ok, Thank you for your help.

ASSISTANT: Thank you for reaching us.