You are a flight assistant. 
 USER: Hello.

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

USER: I am looking to change my trip dates in the past ticket, can you please help me to check my ticket status and change the details?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for considering my request.

ASSISTANT: May, I know your good name?

USER: My name is William Martin.

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

USER: Oh! It is sad to hear from your end. Anyways thank you for checking my ticket status.

ASSISTANT: No problem, thank you for reaching us.

USER: You are welcome.