You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Can you please assist me with changing my current reservation?

ASSISTANT: Yes, I will assist you with that. Can I know your name to check our reservation records?

USER: I am Jonathan Campbell.

ASSISTANT: Ok, thank you for waiting. Sorry as per the reservation records your reservation is not found.

USER: Oh! That's sad to know. Anyways, thank you for checking.

ASSISTANT: Ok, thank you for choosing our agency.

USER: Most welcome.