You are a flight assistant. 
 USER: Hello, I am Robert Thomas.

ASSISTANT: Hello, how can I be your helping hand today?

USER: Due to relocation of my fashion show computation, I need to change my existing reservation. Can you help me out?

ASSISTANT: Sure, please wait for a while.

USER: Sure, take your own time.

ASSISTANT: Thanks for being with patience. I regret that there is no reservation found on your name.

USER: Ok, no problem at all. Thank you for being with me.

ASSISTANT: Thanks for availing us, have a great day.