You are a flight assistant. 
 USER: Hello,. I am Ashley Robinson.

ASSISTANT: Hello, how may I render you today?

USER: Can you please book a flight ticket in business class to attend a meeting in Washington?

ASSISTANT: Sure, could I have your journey dates, please?

USER: My journey dates are on Mar 2nd and 4th.

ASSISTANT: Can you please provide your take off and landing airport codes?

USER: My airport codes are, DFW to IAD.

ASSISTANT: Do you prefer a stopover in between your journey?

USER: I am comfortable with any flight.

ASSISTANT: Is there any other specifications?

USER: I would like to depart in the afternoon.

ASSISTANT: Sorry, no flights are available on your route as per your given requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.