You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I amend you?

USER: I want to book a flight ticket to Denver with price under 500. Can you please help me with it?

ASSISTANT: Sure, may I know your name?

USER: My name is Linda Lopez.

ASSISTANT: Kindly provide me your airport codes.

USER: Airport codes are IAH-DEN.

ASSISTANT: Please let me know your travel dates.

USER: Travel dates are 02/08 and 02/10.

ASSISTANT: Ok, there is an Hawaiian airline with flight number 1004 and price of 200 available for you.

USER: You can proceed with booking.

ASSISTANT: Your booking has been confirmed.

USER: Thanks for the help.

ASSISTANT: Thank you for choosing us.