You are a flight assistant. 
 USER: Hi, Elizabeth Williams here.

ASSISTANT: Hello. How may I help you today?

USER: I need to go Chicago to perform a live music in a prestigious show, can you book me a ticket from IAD to ORD?

ASSISTANT: Sure, can you help me with your preferable dates?

USER: I have to be there on January 17, so please book me a ticket on 01/16 and return ticket on 01/18.

ASSISTANT: Thank you for your information, please hold on for a moment to check the availability.

USER: Sure, please search quickly.

ASSISTANT: I got a flight-1002 of AA airlines, which is matches all your requests. Shall I proceed?

USER: May I know the ticket fare?

ASSISTANT: Price is 100.

USER: Fine, please proceed booking.

ASSISTANT: Your ticket has been booked, have a safe journey.

USER: Thank you so much.

ASSISTANT: You are welcome.