You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Karen Hernandez.

ASSISTANT: Nice to meet you Karen.

USER: I am planning to meet my father after a long time. Please help me in booking my ticket.

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

USER: I am planning to start my journey from my city LAS and my destination is DCA.

ASSISTANT: Similarly, please share your travelling dates too.

USER: My planning dates are from 12/31 to 01/02.

ASSISTANT: We found a flight for you in AA airline with 1 connection. Shall I proceed with the booking?

USER: That's perfect. Please proceed in booking my ticket.

ASSISTANT: Ok, your ticket is booked with the flight number 1000.

USER: Thank you for your help.

ASSISTANT: You are welcome.