You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am a singer, I have to host a show at Charlotte. Could you book my ticket from IAD to CLT?

ASSISTANT: Sure, I am willing to help you for this. When are you planning your trip?

USER: My itinerary dates are Apr 28 and Apr 30.

ASSISTANT: Is there any class preference?

USER: I prefer economy class.

ASSISTANT: Do you have any other criteria regarding your journey?

USER: I need a single lay by in my journey.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: May I know your name please?

USER: Justin Lopez here.

ASSISTANT: There is a flight with United Airlines and the ticket fare is 100. Would you like me to make the booking now?

USER: Please book my ticket.

ASSISTANT: Your ticket is reserved in economy class with the flight-1009. Your depart time is 8:00 hours and again your arrival time is 8:00 hours.

USER: Thank you for assisting me.

ASSISTANT: Thank you very much for contacting our agency.