You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Sarah Martinez here. I want to travel from JFK to OAK for my business meeting, can you please help me out with booking of a flight ticket?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Thank you, my boarding is on Oct 08 and please book my return ticket also on Oct 10.

ASSISTANT: Do you have any class preference?

USER: I will prefer economy class for my journey.

ASSISTANT: There is a direct flight available with UA airline, shall I proceed?

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

ASSISTANT: Your booking is done with flight number 1002. Happy journey.

USER: Thank you for your kind assistance.

ASSISTANT: You are welcome, have a nice day.