You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I am Larry Walker. Could you please book a flight ticket to IAH from LAS?

ASSISTANT: Sure, we are euphoric to help you. Can you share me your itinerary dates?

USER: Thank you. I want to travel on May 16 and return on May 18.

ASSISTANT: Do you need any whistle stop in your journey?

USER: Yes, I need a whistle stop.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Do you have any other requirements?

USER: I want to return in the evening.

ASSISTANT: We found a connecting flight with fare of 100 and 1021 flight number. Shall I proceed?

USER: If the return time is evening, please proceed.

ASSISTANT: Your seat has been reserved with American Airlines in economy class and you will arrive at 20:00 PM.

USER: Thank you for your quick response.

ASSISTANT: Thank you for opting us.