You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Scott Wilson here.

ASSISTANT: Scott, how can I help you?

USER: I want to change in the dates of reservation, as some of my friends are need to join us if I change the dates, can you please help me in altering my reservation?

ASSISTANT: Sure. Sorry, no reservation found by your name.

USER: It's alright, no problem. Thanks for searching and quick help.

ASSISTANT: Thank you for contacting us.