You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. What help will you expect from us?

USER: Can you please help me in booking my flight ticket from DFW to IAD?

ASSISTANT: Yes, I am here to solve your query about your flight ticket booking. Can you please help me with your planned dates of journey?

USER: My planned travel dates are Mar 17-19.

ASSISTANT: Ok, please send me your requirement about the timings to depart and return.

USER: I am comfortable to fly in any timings.

ASSISTANT: Would you let us know if you have any other preferences?

USER: I would prefer direct flight.

ASSISTANT: Can you please tell me your respective name?

USER: Myself, Stephen Turner.

ASSISTANT: I am really sorry for the inconvenience, there are no flights found in this route to your locations.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: You are welcome. Thank you for approaching us.