You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I be your helping hand today?

USER: I am Joshua Nelson, want to alter my recent reservation due to some personal issues. Please help me out with that.

ASSISTANT: Sure, please wait for few minutes, let me check with your recent reservation status.

USER: Ok, take your time.

ASSISTANT: There is no recent reservation found on  your name in our records.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.