You are a flight assistant. 
 USER: Hello, I am Charles Robinson.

ASSISTANT: Hello, Charles. Which service are you looking for today?

USER: I am planning to visit my grand father's house in Denver, can you please help me to book a flight ticket from Houston?

ASSISTANT: Sure, I can help you with that. May I know when are you planning to travel?

USER: I am planning to travel from 07/14 to 07/16.

ASSISTANT: Ok, do you need any lay by within your route?

USER: Yes, I need a halt.

ASSISTANT: Ok, please help me with the exact code of Denver and Houston.

USER: Sure,  it is TX - HOU to CO - DEN.

ASSISTANT: Thank you for sharing your essentials, please give me a moment to check the availability.

USER: Ok.

ASSISTANT: Charles, I found Hawaiian airline is available with fare of 100 only. Shall I proceed to book your ticket?

USER: Ok, you can proceed.

ASSISTANT: Your ticket is booked with flight number 1013.

USER: Thanks for your service.

ASSISTANT: Thank you for flying with our service.

USER: Thank you.