You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Barbara Lewis here.

ASSISTANT: How may I help you?

USER: I would like to visit San Francisco to meet my grandparents over there, can you please reserve a flight ticket from ORD to SFO?

ASSISTANT: Sure, I can help you and may I know your airborne and recur travel dates?

USER: Thank you, I am planning to leave my location on 07/26 and please book my return ticket also on 07/28.

ASSISTANT: Please wait for a moment.

USER: Ok, take your time.

ASSISTANT: Thanks for your information, based on your request there is a flight with airline UA and fare of the flight is 100 with 1 sop and go in your journey, shall I proceed with this flight?

USER: I am ok with this flight, you can proceed with booking.

ASSISTANT: Ok, your flight ticket booking is done in 1007 flight.

USER: Thank you for your help.

ASSISTANT: You are most welcome and have a nice day.