You are a flight assistant. 
 USER: Hello, I am Carol Jackson.

ASSISTANT: Hello, How can I help you?

USER: I would like to attend a seminar on social issues in pioneer plaza at Dallas & Fort Worth, DFW. Could you please avail me a flight ticket?

ASSISTANT: Sure, May I know the source code?

USER: My preferred boarding point is Washington, DC-DCA.

ASSISTANT: Please help me with your travel dates.

USER: I am willing to travel on 06/21 and intend to return on 06/23.

ASSISTANT: Thank you for your details, Please wait a minute.

USER: Sure.

ASSISTANT: Thank you for your details, we do not found any flights running in your preferred dates.

USER: Not a problem, I will try with another airline.

ASSISTANT: Ok.

USER: Thank you for the information.

ASSISTANT: Thank you for reaching us, Have a nice day.