You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to book a ticket from ORD to DEN, can you please help me out?

ASSISTANT: Sure, may I know your travel dates?

USER: I am travelling on these dates Aug 12th and 14th.

ASSISTANT: Please share me your name.

USER: Sarah Lopez here.

ASSISTANT: Do you have any specifications?

USER: I prefer economy class.

ASSISTANT: Flight-1002 is available with Delta airlines having single connection and the ticket costs you 100 only in economy class. Are you comfortable with this flight?

USER: Ok, you can proceed.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for your services.

ASSISTANT: Thank you.