You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you please book a flight ticket from AUS to DEN?

ASSISTANT: Sure. Let me know your travelling dates.

USER: I want to travel in the month of July form 1st to 3rd.

ASSISTANT: Do you have any preference?

USER: No, thanks for asking.

ASSISTANT: Let me know your name.

USER: This is Rebecca Hernandez.

ASSISTANT: Sorry, no flights found for your travelling dates. Thank you.

USER: That's ok, thank you for checking.