You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Elizabeth Evans here. Can you book a connecting flight to Los Angeles for my family vacation?

ASSISTANT:  Certainly, could you please share your departure and arrival dates?

USER: The travel dates for the journey would be from 03/24 to 03/26.

ASSISTANT: May I know your airport codes?

USER: My airport codes for boarding the flight are DEN to LAX.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flight is available for you. Thank you for reaching us, have a nice day.

USER: Ok, not a problem. Thank you.