You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

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

ASSISTANT: Sure, can you please share your travel dates?

USER: My travelling dates are from 06/07 to 06/09.

ASSISTANT: May I know your connection limit?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other specification that you are looking for?

USER: No.

ASSISTANT: May I know your name to proceed further?

USER: Myself Deborah Jackson.

ASSISTANT: I am sorry to inform you that there is no flight available at your request.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for contacting us.