You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in reserving the ticket from IAD to PHL?

ASSISTANT: Please provide your journey dates.

USER: I would like to travel on Aug 7 and again I will return back on Aug 9.

ASSISTANT: Do you have any specifications?

USER: I want to travel in single connection flight.

ASSISTANT: Can I know your name?

USER: Myself Steven Evans.

ASSISTANT: Sorry, currently there is no flight for your travelling dates.

USER: Not a big deal, anyhow thank you very much for your information.

ASSISTANT: Thank you.