You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Nicholas Lewis.

ASSISTANT: How can I assist  you?

USER: I would like to attend a client meeting in my office at Philadelphia so, can you book a ticket from Chicago?

ASSISTANT: Sure. Can I know your travelling dates?

USER: I want to travel on 10/12 and return on 10/14.

ASSISTANT: Please share me your airport codes.

USER: My journey airport codes are ORD and PHL.

ASSISTANT: We found a Frontier airline, flight number:1013 and the price is 100. Can I reserve it?

USER: Yes, please confirm my ticket.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your kind response.

ASSISTANT: Thank you .