You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Could you please book a flight ticket from DFW to SFO?

ASSISTANT: Sure, please help me with your travel dates.

USER: I want to travel on Apr 23 and return back on Apr 25.

ASSISTANT: Ok, may I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: Ok, please help me with your name.

USER: My name is Carolyn Mitchell.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: There is a flight with single connection available in AA airlines and the ticket fare is 100 only. Is that ok for you?

USER: Ok, proceed with the booking.

ASSISTANT: Your ticket is booked in economy class with the flight-1018. Flight departure time is at 13:00PM and arrival time is at 11:00AM.

USER: Thank you for assisting me.

ASSISTANT: You are welcome and have a nice day.