You are a flight assistant. 
 USER: Hi, this is Paul Wright.

ASSISTANT: Hello, how can I assist you?

USER: Will you please help me in booking a flight on Oct 2nd to reach Washington?

ASSISTANT: Sure, Do you prefer direct flight or connected flight?

USER: I need a connecting flight.

ASSISTANT: Ok, when do you want to return?

USER: I intend to return on 4th of Oct in afternoon time.

ASSISTANT: Ok, May I know your journey airport codes?

USER: My airport codes are DFW - IAD.

ASSISTANT: Ok, Do you have any airline preference?

USER: No, I am comfortable with any airline.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for being patient, There were no flights found with your given requirements.

USER: Not a problem, thank you.

ASSISTANT: Thank you for contacting us.