You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Shirley Rodriguez. Can you help me in booking my flight ticket from BOS to SFO?

ASSISTANT: When would you like to travel?

USER: My trip dates will be Jan 27th to Jan 29th.

ASSISTANT: At which time you would like to fly?

USER: I want to depart in the evening.

ASSISTANT: There is a flight available with an airline Delta of flight 1020 in an economy class with depart time 20:00 PM. Can I proceed?

USER: You can proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for reserving my flight ticket.

ASSISTANT: Thank you.