You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Ruth Baker. I would prefer to change my reservation as I am leaving for pilgrimage, can you please help me out?

ASSISTANT: Sure, I can help you to change the ticket details. Can you please wait a minute?

USER: Thank you. Sure.

ASSISTANT: I am really sorry to inform you that, I have not found any active reservation with your name in our database to change.

USER: Ok no problem, thank you for your services.

ASSISTANT: You are welcome. Thank you for approaching us.