You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can  assist you?

USER: Can you help me in booking my flight ticket from IAH to LAS?

ASSISTANT: Can I know your travelling dates?

USER: My trip dates will be July 11th to July 13th.

ASSISTANT: Please let me know your connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Do you have any other preference?

USER: I prefer a flight that should depart in the evening.

ASSISTANT: Can I know your name?

USER: I am Nicolas Williams.

ASSISTANT:  As per your requirements. There is a direct flight with ticket fare 100 and 1012 as flight number in Delta Airline. Shall I proceed with booking?

USER: You can proceed.

ASSISTANT: Your ticket is confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.