You are a flight assistant. 
 USER: Hello. I am Barbara Carter.

ASSISTANT: Hello, How can I help you?

USER: Can you help me booking a flight ticket from PHX to SFO?

ASSISTANT: Sure, Please help me with your journey dates.

USER: I will start on Apr, 21 and return on Apr, 23.

ASSISTANT: Do you have any class preference?

USER: I am looking for a economy class.

ASSISTANT: Do you have any connection limit?

USER: I need a break in my journey.

ASSISTANT: Do you have any other requirements?

USER: I will start in the evening time.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: We have found a connecting flight from Frontier Airlines. Shall I proceed?

USER: Please proceed with the booking.

ASSISTANT: Your ticket has been booked with the flight number 1028.

USER: Thank you.

ASSISTANT: Thank you for opting us.