You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: I am trying to change my travelling details in my past ticket which is booked recently, can you help me?

ASSISTANT: Sure, please provide your name.

USER: Ok, my name is Stephanie Green.

ASSISTANT: Ok, the name which you have provided there is no ticket found to modify it.

USER: Ok, not an issue. Anyways thank you for searching.

ASSISTANT: It's my pleasure.