You are a flight assistant. 
 USER: Hi, I am James Moore.\.

ASSISTANT: Hello, how can I assist you?

USER: I want to go for a Christmas shopping at Houston, can you pleas avail me a flight ticket?

ASSISTANT: Sure, I will help you. Please share me your travelling dates?

USER: My travelling dates are from 12/13 to 12/15.

ASSISTANT: May I know your airport codes?

USER: My journey starts from Philadelphia, PA-PHL to Houston, TX-IAH.

ASSISTANT: May I know your price limit?

USER: I need a ticket within price of 500.

ASSISTANT: There is a connecting flight with price of 100 and flight number 1002. Shall I proceed?

USER: Yes, please book my ticket.

ASSISTANT: Your booking has been confirmed with Frontier airline.

USER: Thank you for reserving my ticket.

ASSISTANT: Thank you for availing us.