You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I would like to celebrate my father's birthday as a sudden surprise to him at Houston, please help me in booking a ticket.

ASSISTANT: We offer services in booking of flight ticket across America. Sure I am here to help you. Please provide the airport codes?

USER: I need your help in booking of a flight ticket from LAS to HOU.

ASSISTANT: Now please help me with your travel dates?

USER: I would like to start my journey on 02/05 and I will be return on 02/07 to my home town.

ASSISTANT: Please wait for a while. As I am checking for the flights available. Would you like to consider a single connecting flight?

USER: Yes, I need a connecting flight from Las Vegas.

ASSISTANT: I am glad to inform you that we do have a flight available in Jet blue airlines.

USER: Ok, I am fine with this flight. Please book the ticket with this flight.

ASSISTANT: As you have contacted us in a festive season we are also offering discount on your flight ticket fare. Sure. Yes, I have confirmed your flight ticket with flight number 1001.

USER: Thank you for your help in booking.

ASSISTANT: Thanks and I wish you a happy journey.

USER: Thank you. My name is Katherine Roberts.

ASSISTANT: Thanks for providing your name.