You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am looking to change the ticket details in the portal but in the middle of the process, I am getting an error. Can you please help me to change the ticket details?

ASSISTANT: Sure, may I know your name please?

USER: Yes, my name is Virginia Collins.

ASSISTANT: Ok, please wait for a moment.

USER: Ok, I will wait for your reply.

ASSISTANT: Sorry to say that, there was no reservation found with your given name.

USER: It's ok, not a problem with that. Anyways thank you for spending your time.

ASSISTANT: Thank you for choosing us.