You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am looking to book a flight ticket from IAH to LAS. Can you help me for that?

ASSISTANT: Can I know your travel dates?

USER: My travelling dates are Sep 05 and Sep 07.

ASSISTANT: Do you have any preference?

USER: My depart time is morning.

ASSISTANT: Let me know your name.

USER: My name is George Davis.

ASSISTANT: Connecting flight can be booked with airline Southwest for price 300 having flight number 1026.

USER: Ok, proceed for booking.

ASSISTANT: Ticket is booked.

USER: Thank you for booking.

ASSISTANT: Thank you.

USER: Welcome.