You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I aid you?

USER: I would like to attend my Father's Retirement Celebrations in Houston, TX - HOU. Can you please book a flight ticket with price of 200?

ASSISTANT: Sure. Please share me your  travelling dates.

USER: I will start my journey on 07/19 and end my journey on 07/21.

ASSISTANT: Where would you like to start from?

USER: My boarding airport is from Boston, MA - BOS.

ASSISTANT: We found a Frontier airline, flight number:1002 and the price is 200.

USER: I am comfortable to travel with Frontier airline, please make it confirm on the name of Dorothy Hall.

ASSISTANT: May I know your name? Ok. Your flight ticket has been reserved.

USER: Thank you for assisting me.

ASSISTANT: Thank you.