You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Robert Hall.

ASSISTANT: How may I help you out?

USER: Can you help me in booking a flight ticket from DCA to BOS?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I want to travel on 09/01, and return on 09/03.

ASSISTANT: Can I know your preferences?

USER: I want to depart in the morning time.

ASSISTANT: Do you prefer any other specifications?

USER: I need a connecting a flight.

ASSISTANT: Sorry, there are no flights found.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thanks for the information.