You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I want to book a flight ticket form EWR to DCA, can you please book a flight ticket for me?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are Jan 10 and Jan 12.

ASSISTANT: On which name shall I reserve flight ticket?

USER: My name is Robert Thompson.

ASSISTANT: Do you need any connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your other specification?

USER: I don't have any other specifications.

ASSISTANT: Sorry, there are no flight tickets available on your journey dates.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for reaching our service.