You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Virginia Martin. I have planned for the trip to Houston with my family members, can you please help me to find a flight from Boston?

ASSISTANT: Sure, I am here to help you out. Please provide me your location airport to check the availability of the flight.

USER: Thank you for accepting my request. My preferred airport codes are BOS and HOU.

ASSISTANT: May I know the planned travel dates?

USER: I am willing to travel on the dates of 12/18 and 12/20.

ASSISTANT: I regret to inform you that, there is no flight in your route with your travel dates in your way. Sorry for inconvenience caused.

USER: It's ok, not a problem with that. Thank you for searching the flights.

ASSISTANT: Thank you for reaching us.