You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Emily Walker. I would like to visit white house located at Washington. Can you please book a ticket with a lay by?

ASSISTANT: Please provide airport codes, in order to book ticket.

USER: I prefer to start at SFO and return from IAD.

ASSISTANT: May I know your travel dates?

USER: I need to depart on 11/19 and return on 11/21.

ASSISTANT: Ticket can be booked with airline AA, for price 100. Flight number is 1010 with connections 1.

USER: Please reserve this on my name.

ASSISTANT: Ticket is reserved by name Emily Walker.

USER: Thanks for your great service.

ASSISTANT: Have a great day!.