You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Kimberly Miller this side, I am going to meet my university's professor, can you help me to book a ticket?

ASSISTANT: Sure, may I know your airport codes please?

USER: I want ticket from DCA to LAS.

ASSISTANT: Ok, may I know your travel dates please?

USER: I am looking to start on 02/08 and return on 02/10.

ASSISTANT: Ok, hold on for a moment.

USER: Ensure that connection limit is 1.

ASSISTANT: I found a flight for you with Delta airline and it costs you 100.

USER: Please book it.

ASSISTANT: Shall I proceed?

USER: Thank you for your help.

ASSISTANT: Your ticket has been booked with 1006 flight number.

USER: Thank you.

ASSISTANT: Thank you for choosing us.