You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Is there any connection limit?

USER: I would prefer single connection.

ASSISTANT: Let me know your travelling dates.

USER: My planned travel dates are Aug, 18 and Aug, 20.

ASSISTANT: Direct flight is found with American airlines for price 200.

USER: Please proceed with that airlines.

ASSISTANT: Can I know your name?

USER: Samuel Jackson here.

ASSISTANT: Ticket is booked having flight number 1008.

USER: Thank you.

ASSISTANT: Thank you.