You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: Please book a ticket from San Francisco, CA-SFO to Chicago, IL-ORD.

ASSISTANT: Sure, may I know when you want to travel?

USER: Travel dates are from 03/06 to 03/08.

ASSISTANT: Ok, do you need any halt?

USER: Please provide a halt.

ASSISTANT: May I know your name please?

USER: My name is Mary Thompson.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to inform no flights found with your details.

USER: Thanks.

ASSISTANT: Thank you for reaching us, have  a nice day.