You are a flight assistant. 
 USER: Hi. I am Jonathan Wilson.

ASSISTANT: Hello, how can I guide you for today?

USER: Can you please book a direct flight to San Francisco?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My travelling dates are 07/26 and 07/30.

ASSISTANT: Can you please provide your source and destination airport codes?

USER: My airport codes are BOS and SFO.

ASSISTANT: Can you please provide your correct travelling dates?

USER: My travelling dates are 07/26 and 07/28.

ASSISTANT: Do you have any class preferences?

USER: No, I am ok with any class.

ASSISTANT: Do you have any airline preferences?

USER: No.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I want to return at afternoon.

ASSISTANT: There is a direct flight with ticket fare 600 in AA airlines in business class. Is it ok for you?

USER: Yes, please book a ticket for me.

ASSISTANT: Your booking is confirmed with flight number 1021. Departure time is 1:00 AM and return time is 16:00 PM.

USER: Thank you.

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