You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Donald Thompson.

ASSISTANT: How can I assist you today?

USER: Can you please help in booking my flight from SFO, as I have to attend a meeting at CLT?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Sure, my planned travel dates are Apr 28th and Apr 30th.

ASSISTANT: Do you have any specifications?

USER: I need a single connecting flight.

ASSISTANT: Do you have any preferences about class?

USER: No, but my depart time must be in the evening.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Please give me a moment.

USER: Ok, sure.

ASSISTANT: Thanks for waiting. The Frontier airline is providing an economy class flight with price 200 and the connection 1. The departure time is evening. Shall I confirm your ticket?

USER: Ok, please proceed.

ASSISTANT: Your ticket is booked. The flight number is 1026.

USER: Thank you for the service.

ASSISTANT: Welcome, have a great day.