You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can you please let me know which help do you need from our agency?

USER: I would like to change my reservation as I am leaving for hometown, can you please help me out?

ASSISTANT: Sure, I will help you to change the ticket details. Can I know your good name please?

USER: Check the reservation on the name Helen Walker.

ASSISTANT: Ok, please hold on for a while. I will check the ticket status and get back to you.

USER: Sure.

ASSISTANT: I regret to tell you that, there is no reservation found with your name in our portal to change the details.

USER: Ok no problem, thank you for checking the status.

ASSISTANT: My pleasure, thank you for opting us.