You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Joseph Adams. I am planning to go for Science Exhibition at Las Vegas, LAS. Can you please book a ticket for me?

ASSISTANT: Sure, please share me your travelling dates?

USER: My depart is on 09/21 and return is on 09/23.

ASSISTANT: Kindly assign me your origin code?

USER: Boarding point is Chicago, ORD.

ASSISTANT: Thanks for your details, we found 1025 Spirit airline with single connection and price of 100. Shall I proceed?

USER: You can proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.