You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: Assist me in booking a flight ticket from LAS to BOS.

ASSISTANT: Sure, may I know your good name?

USER: Amy Rodriguez here.

ASSISTANT: Do you have any class preference?

USER: No, but make sure that my arrival is in afternoon.

ASSISTANT: Ok, could you please help me with your trip dates?

USER: My journey dates are Mar 17 and Mar 19.

ASSISTANT: Is there any other preferences?

USER: Connected flight is required.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights available as per your requirements.

USER: Ok, no issues. Thanks for checking.

ASSISTANT: Thank you for reaching us.