You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to our booking agency.

USER: I need to go to The New England Aquarium in Boston, so could you please help me in flight ticket booking?

ASSISTANT: Sure, please share your airport codes.

USER: I want to travel from Houston, HOU to Boston, BOS.

ASSISTANT: May I know your itinerary dates?

USER: My itinerary dates are 05/19 and 05/21.

ASSISTANT: Please wait for a while.

USER: Sure. I need a flight with connection limit 0. So please check with that.

ASSISTANT: May I know your name for further proceedings?

USER: My name is Donna Nelson.

ASSISTANT: Sorry Donna, we could not find a flight for you on your route.

USER: It's ok, anyways thank you for searching.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.