You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I best assist you now?

USER: I would like to book a flight ticket from DC to narrate  story to an actor in NY, can you please help me to book a flight ticket with single connection?

ASSISTANT: Sure, I am gleeful to assist you. May I know on which dates you are willing to travel?

USER: I would like to start my journey on 01/20 and my return date will be on 01/22.

ASSISTANT: Ok, may I know your boarding and landing airports with codes?

USER: My boarding and landing airport codes are IAD and JFK.

ASSISTANT: May I know your good name please?

USER: I am Timothy Roberts.

ASSISTANT: Is there any another specifications on your trip, so that I can arrange like that only.

USER: No more specifications for this trip.

ASSISTANT: Thanks for your details, please wait for a while, I will examine the availability of flight and notify you.

USER: Sure.

ASSISTANT: Thanks for waiting, there are no flights available at this moment matching your particulars.

USER: That's ok, I'll choose any alternative to reach my destination. Thank you for your information.

ASSISTANT: Thanks for reaching us, wish you a great day.