You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Michael Turner.

ASSISTANT: How may I aid you?

USER: Can you please change my recent reservation?

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Ok, sure.

ASSISTANT: Sorry, no reservation found for this search.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for choosing us, have a nice day.