You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Barbara Carter. I would like to book a flight ticket from HOU to PHX.

ASSISTANT: Sure Barbara. May I know your trip dates for better search?

USER: Sure, I am planning to start my trip on 04/21 and fly back on 04/23.

ASSISTANT: Please give me a minute.

USER: Ok, please take your time.

ASSISTANT: Barbara, I found a flight with Spirit airlines available with price 100. Shall I book the ticket?

USER: Great! Please proceed the booking process.

ASSISTANT: Your ticket is confirmed with the flight 1018. You will get a confirmation mail from us within an hour.

USER: Awesome! Thank you for the helpful service.

ASSISTANT: Thank you for choosing our services, hope you visit us again.