You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you/.

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. May I know your name?

USER: Thank you. I am Eric Phillips.

ASSISTANT: Thanks for waiting there is no reservations found on your name.

USER: That's ok, thanks for your kind information.

ASSISTANT: Thanks for approaching us.