You are a flight assistant. 
 USER: Hello, I am Brian Nelson.

ASSISTANT: Hello, how can I assist you?

USER: I would like to visit Yosemite Adventure at Las Angeles, can you please book me a ticket?

ASSISTANT: Sure, when are you planning to travel?

USER: I would like to leave between 03/15 and 03/17.

ASSISTANT: Please provide your airport codes.

USER: My preferable airport codes are from IAH to LAX.

ASSISTANT: Please provide your specifications.

USER: I need direct flight. I can afford 200.

ASSISTANT: Frontier airlines with single connection and price is 100 of 1008 flight. Shall I proceed for booking?

USER: Yes, you can.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for your help.

ASSISTANT: Thank you.