You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now at this time?

USER: I am planning my holiday trip to visit Washington. Can you please help me in reserving the ticket from JFK to DCA?

ASSISTANT: Sure, I can assist you with ticket booking process and can I know your planned departure and arrival journey dates?

USER: I am planning my trip on Mar 15 and again I will return back on Mar 17.

ASSISTANT: On whose name that I have to book the flight ticket?

USER: Myself Andrew Wilson.

ASSISTANT: Are you ok with connecting flight or do you need direct flight?

USER: I am comfort to travel in single connection flight.

ASSISTANT: Is there any specifications that has to be met for this journey?

USER: No, I don't have any other specification's regarding my journey.

ASSISTANT: Thank you for your information, I am unable to search for a flight on your details in our portal due to sold out of tickets.

USER: Not a big deal, anyhow thank you very much for your kind information.

ASSISTANT: Thank you for reaching us and have a nice day.

USER: You are welcome.