You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your name?

USER: I am Debra Thompson.

ASSISTANT: Can I know your travelling dates?

USER: I want to travel on 10/17, and return on 10/19.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: May I know your class preferences?

USER: No, but I want to depart in the morning time.

ASSISTANT: May I know your name?

USER: I already mentioned above.

ASSISTANT: Sorry for inconvenience.

USER: Ok.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: Sorry, there are no flights available.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you for choosing us.