You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Eric Harris,need a small help from you. Will you please help me?

ASSISTANT: Yes sure, please provide me your trip details.

USER: I am deciding to go Phoenix for my vacation from Las Vegas.

ASSISTANT: If you know your airport codes then please let me know.

USER: My airport codes are from LAS to PHX and I want to travel on 02/20 and 02/22.

ASSISTANT: Can I know your price limit?

USER: Yes, my price limit should be with in 200.

ASSISTANT: I have 1 flight in Hawaiian airline. This airline is give you 50% discount because you are our 100th customer. So, price is 100 only.

USER: Oh! that's really great,I am very lucky to have this offer from your airlines. Please confirm my booking with this flight.

ASSISTANT: Sure. Your flight ticket is booked.

USER: Thank you for your service.

ASSISTANT: Welcome.