You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I need to book a ticket from HOU to IAH. Could you book a ticket?

ASSISTANT: Sure, I am here to help you. Can you please help me with your travel dates?

USER: Departure is Nov, 12 and return date is Nov, 14.

ASSISTANT: Ok, do you have any requirements?

USER: I prefer direct flight.

ASSISTANT: Sure, may I know your name?

USER: My name is Donna Walker.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: There is a flight available as per your requirements in UA airlines and the ticket fare is 200 only. Can I book the ticket for you?

USER: Please book a ticket.

ASSISTANT: Your ticket is booked successfully with the flight-1010. Have a safe flight.

USER: Thank you.

ASSISTANT: You are welcome and thank you for choosing us.