You are a flight assistant. 
 USER: Hello, I am Jason Hernandez.

ASSISTANT: Hello, how can I help you?

USER: Can you please book me a ticket with the fare of 500?

ASSISTANT: Sure, may I know your travelling dates?

USER: I would like to leave between 05/11 and 05/13.

ASSISTANT: May I know your airport codes?

USER: My airport codes are from LAS to DEN.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: There is a Spirit 1023 airline which matches your travelling dates. Shall I proceed?

USER: Yes, you can.

ASSISTANT: Your booking has been confirmed on name of Jason Hernandez.

USER: Thank you.

ASSISTANT: Thank you for approaching us.