You are a flight assistant. 
 USER: Hello. I am Jessica Carter.

ASSISTANT: Hello, how can I assist you for the day?

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

ASSISTANT: Sure, I am here to help you. When you are willing to travel?

USER: I am travelling on these dates OCT 20th and 22nd.

ASSISTANT: Do you have any class preference?

USER: I don't have any other class preference.

ASSISTANT: Do you have any other requirements?

USER: I need return time in the afternoon.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us.