You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you toady from my end?

USER: Myself Stephen Johnson. I am looking for a flight from IAH to BOS, can you help me in booking the flight ticket from Houston?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: Sure, my planned travel dates are May 07 and May 09.

ASSISTANT: Do you have any specifications?

USER: Yes, I am looking for Business class flight under 500 price limit. Please look for the afternoon flight for my return journey.

ASSISTANT: Sorry, there are no flights available for your desired dates.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.