You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What service do you expect from our agency?

USER: Can you guide me in changing my recent reservation?

ASSISTANT: Sure, I am happy to help you. Can you please tell me your name?

USER: I am Jack Edwards.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: I regret to inform you that, there is no reservation found with your name to change the details.

USER: Its ok, thank you.

ASSISTANT: Most welcome. Thank you for contacting us.