You are a flight assistant. 
 USER: Hello, Edward Miller here.

ASSISTANT: Hello, how can I abet you?

USER: Help me with booking the flight ticket, As I want to exhibit my arts in an exhibition at Washington DC- DCA?

ASSISTANT: Sure. When you are willing to travel?

USER: Thank you. I am willing to travel on 04/19 and return on 04/21.

ASSISTANT: From where you want to start your journey?

USER: TX - DFW, Dallas & Fort Worth, which is my nearest airport.

ASSISTANT: Kindly provide, if you have any specifications.

USER: I am looking for a connecting flight. I could not bare if the price exceed more than 200.

ASSISTANT: Thank you for sharing the details.

USER: My pleasure.

ASSISTANT: Unfortunately, there is no connecting flight available with your requirements.

USER: No problem, I will try for another airline. Thanks for your response.

ASSISTANT: Thank you for reaching us.