You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please book me a flight ticket from IAD to EWR to meet my family?

ASSISTANT: Sure, can you please mention your departure and arrival dates of your journey?

USER: I have planned to travel on Dec 15th and return on Dec 17th.

ASSISTANT: Do you need any flag stop in between journey?

USER: Yes, I like one connecting flight.

ASSISTANT: Do you have specific time concern for return and depart?

USER: No, thanks.

ASSISTANT: May I know your name please?

USER: Steven Walker.

ASSISTANT: Thanks for sharing your details, we are unable to provide flight in between your journey routes.

USER: Ok, no problem. Thank you.

ASSISTANT: You are most welcome.