You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to attend a comic con at Houston, can you please book a ticket?

ASSISTANT: Sure, can you please share your airport codes?

USER: My airport codes are from NV-LAS to TX-IAH. I need a direct flight.

ASSISTANT: Please mention your name and dates of travelling?

USER: My dates of travel from 10/14 to 10/16.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Ok.

ASSISTANT: Thanks for your valuable time, sorry, unfortunately no flights matching your criterion.

USER: Ok, thank you for your response.

ASSISTANT: Thanks for connecting with us, have a great day ahead.

USER: I am Ryan Carter.

ASSISTANT: Thanks for providing details, have a great day ahead.