You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Ashley Walker here. I want to book a flight reservation on the route from IAH - BOS to sell my apartment in Boston, can you please help me?

ASSISTANT: Sure, can you please share your travel dates?

USER: My travelling dates for this journey will be from 07/17 to 07/19.

ASSISTANT: Let me check for the availability of flight.

USER: Ok, please check within the price of 500.

ASSISTANT: Ashley, I am sorry to inform you there is no flight available at your requested dates.

USER: Oh! That's fine, thank you for assisting me with your services.

ASSISTANT: Thank you for contacting us, have a great day.

USER: You are most welcome.