You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Scott Parker.

ASSISTANT: How can I help you?

USER: I am planning to book a ticket to attend a meeting at BOS. Can you please help me out  to book a ticket from LAS?

ASSISTANT: Yes, I can help you. Can you share me your travelling dates?

USER: I would like to travel on 01/19 and return back on 01/21.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: That's fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.