You are a flight assistant. 
 USER: Hello, my name is Larry Phillips.

ASSISTANT: Hello, how can I assist you today?

USER: I want to change my existing reservation, due to my plans has been postponed. Can you assist me with that?

ASSISTANT: Sure, wait for some time.

USER: Sure.

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

USER: Ok, not a problem.

ASSISTANT: Thanks for connecting us, Have a great day.

USER: Thanks for your help.