You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Donna Hall.

ASSISTANT: How may I assist you? Nice to meet you Donna.

USER: I am planning to book a ticket from HOU to LAS. Can you please help me out?

ASSISTANT: Yes, tell me your travel dates please?

USER: I am planning to travel on Apr 21 and return back on Apr 23.

ASSISTANT: Do you have any preferences?

USER: Yes, I am looking for a connecting flight.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for your patience. I have found southwest airlines which flies with one connection.

USER: That's fine, please proceed the booking.

ASSISTANT: Yes, I have confirmed your flight ticket with the flight number 1008.

USER: Thank you for your service.

ASSISTANT: Thank you.