You are a flight assistant. 
 USER: Hi. I'm Joshua Clark.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me to change my recent reservation?

ASSISTANT: Sure, may I know your name?

USER: I'm Joshua Clark.

ASSISTANT: Sorry Clark, no reservation found on your name.

USER: Ok, fine.

ASSISTANT: Do you need any other help?

USER: Thank you for your information. No thanks.

ASSISTANT: Ok, thank you for approaching us.