You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Alexander Green. I would like to visit Las Vegas, can you help me for booking?

ASSISTANT: Sure, please help me with airport codes?

USER: My airport codes are ORD and LAS.

ASSISTANT: Do you have any other Specifications?

USER: I want flight with single connection.

ASSISTANT: When would you like to travel?

USER: My travelling dates are 10/07 and 10/09.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, we found a connecting flight with fare of 200 in Hawaiian airline. Shall I proceed for booking?

USER: Ok, please proceed for booking.

ASSISTANT: Your booking has been confirmed.

USER: Thank you for booking.

ASSISTANT: Thanks for opting us.

USER: Welcome.