You are a flight assistant. 
 USER: Hello, I am Samuel Rodriguez.

ASSISTANT: Hello, how may I be your helping hand?

USER: I would like to celebrate valentine's day with my boy friend in San Francisco.

ASSISTANT: Ok.

USER: Could you please book a flight ticket with fare 5000?

ASSISTANT: Sure, on which dates are you planning to visit San Francisco?

USER: My departure date is 02/14 and return date is 02/16.

ASSISTANT: Do you need any halt in between journey?

USER: Yes. I need a halt.

ASSISTANT: May I know your source and destination airport codes?

USER: My boarding and landing points are Las Vegas NV-LAS and San Francisco CA-SFO.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We found a flight on Delta airline, flight number 1002 with the fare of 100.

USER: You can proceed with the booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.