You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Due to sudden change in my trip to another location, I would like to change my reservation. Can you please help me out?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can I have your name to proceed further?

USER: I am Catherine White.

ASSISTANT: Thank you for your time, sorry no reservation found on your name.

USER: It's ok, thank you.

ASSISTANT: Thank you for availing us.