You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you please book me a flight ticket from ORD to SFO to meet my family?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I have planned to travel on Sept 14th and return on Sept 16th.

ASSISTANT: Do you have any other specifications?

USER: I want to return at evening time with economy class.

ASSISTANT: Can you please share me your name?

USER: Ronald Adams.

ASSISTANT: We found a direct flight with an airline Delta of flight 1017 in an economy class. Can I proceed?

USER: Ok, please book it.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you.