You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Samuel Rodriguez. I have to meet my childhood friends in Washington, can you please help me to search a flight from IAH to IAD?

ASSISTANT: Sure, I am here to help you with that. Can you send me your planned trip dates?

USER: Thank you. I want to travel on the dates of 05/20 and 05/22.

ASSISTANT: Ok, wait for a while so that I will check the best flight for you.

USER: Ok, I will wait for your response but I want a flight which is having a connection limit 1. So, please provide me that flight.

ASSISTANT: Sorry to say that, there are no flight's based on your connection limit.

USER: It's ok, I will reach some other travel agency to reserve my ticket. Anyways thanks a lot for spending your time.

ASSISTANT: Thank you for consulting us.