You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Please help me to book a flight ticket from LAX to LAS.

ASSISTANT: May I know your travelling dates please?

USER: My journey dates are from Oct, 16 to Oct, 18.

ASSISTANT: Do you have any connection limit?

USER: I need  a single connecting flight.

ASSISTANT: Is there any specifications?

USER: No.

ASSISTANT: May I know your name please?

USER: Joseph Phillips.

ASSISTANT: I am sorry no flights found on your route.

USER: Thank you for your information.

ASSISTANT: Thank you for choosing us.