You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I need a flight ticket to Washington for attending food festival with my friends. Can you please book me a flight ticket?

ASSISTANT: Sure, please share me your travelling dates?

USER: My travelling dates are 01/04 and 01/06.

ASSISTANT: OK, do you have any specifications?

USER: Yes, I need one connection with fare of 200.

ASSISTANT: OK, may I know your airport codes?

USER: My airport codes are DTW - DCA.

ASSISTANT: Please wait for few minutes, let me check and revert you.

USER: Ok.

ASSISTANT: There is no flight with your requirements.

USER: Ok, no issues.

ASSISTANT: Please provide me your good namr?

USER: Dennis Carter is my name.

ASSISTANT: Thank you, for reaching us.

USER: Thanks for your help.