You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to celebrate my birthday at San Francisco, please help me in booking a ticket from CLT to SFO.

ASSISTANT: Sure, I can help you. Can you please let me know your trip dates?

USER: My planned travel dates are on Apr 18 and Apr 20.

ASSISTANT: Ok, may I know your class preference?

USER: Any class is comfortable for me.

ASSISTANT: May I know your name?

USER: My name is Michelle Lopez.

ASSISTANT: Do you have any requirements?

USER: I would like to return in the afternoon. I need a connecting flight.

ASSISTANT: There is a flight-1004 having single connection with the ticket fare of 100 in economy class. Is that ok for you?

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket is booked. Your flight departure time is at 9:00AM and arrival time is at 17:00PM.

USER: Thank you for your help.

ASSISTANT: You are most welcome.