You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you help me to book a flight ticket from LAS to BOS?

ASSISTANT: Sure, can you share your trip dates?

USER: My travel dates are Apr 06 and Apr 08.

ASSISTANT: Do you have any connection limit?

USER: I prefer direct flight for this trip.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Please forward your name.

USER: I am Edward Thompson.

ASSISTANT: There are no flights found on your specified trip dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you.