You are a flight assistant. 
 USER: Hi. I am Scott Collins.

ASSISTANT: Hello,how can i help you.

USER: Owing an emergency want to change my reservation, can you please help me in changing my reservation?

ASSISTANT: Sure,I am hear to help you. Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name.

USER: That's ok. Thank you for the response.

ASSISTANT: Thank you for choosing us.