You are a flight assistant. 
 USER: Hello. Myself Stephen Robinson.

ASSISTANT: Hello, how may I assist you today?

USER: I need to travel Washington DC, can you please reserve flight ticket from DFW and IAD?

ASSISTANT: Sure, let me know your travelling dates?

USER: My travelling dates are Sept,22 and Sept,24.

ASSISTANT: Do you prefer direct flight or connecting flight?

USER: I am ok with any connection limit.

ASSISTANT: May I know your depart and arrival timings?

USER: My depart time should be in the afternoon and my return should be in the evening.

ASSISTANT: Do you have any other preferences?

USER: I have already mentioned all my specifications.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flight found on your journey routes.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey.

ASSISTANT: Thank you for reaching us.

USER: Thank you for the information.