You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Laura Walker.

ASSISTANT: How may I help you out?

USER: I want to book a flight ticket to LAS for attending a small event about my parents. Can you please help me to book a flight ticket to LAS from DTW?

ASSISTANT: Sure, I will help you in booking the ticket.

USER: Thank you for considering my request.

ASSISTANT: May I know your travelling dates please?

USER: Sure, my travelling dates of journey are 11/10 and 11/12.

ASSISTANT: Sorry, there are no flights found.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Thank you for choosing us.