You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Nancy Thomas from Las Vegas.

ASSISTANT: Nice to meet you.

USER: Nice to meet you too. I want to go Denver next week, can you please book a flight ticket for me?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Thank you. I want to take off on 10/27 and book my return ticket also on 10/29.

ASSISTANT: Please provide your airport codes that you want to travel.

USER: I would like to fly from LAS airport and destination airport is DEN because these two airports are very convenient for me to travel.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, there is a flight with price 100 and the connections 1 is available.

USER: I am comfortable with this flight, please proceed.

ASSISTANT: Your ticket is booked. The flight number is 1000 and the airline is Delta.

USER: Thank you for your service.

ASSISTANT: Welcome, have a great day.