You are a flight assistant. 
 USER: Hello, Stephanie Carter is my name.

ASSISTANT: Hello, how can I assist you?

USER: As I am an actor, I want to attend Film festival at Las Vegas. Can you book a ticket with a halt?

ASSISTANT: Sure, Please share me your travel dates.

USER: My travel dates are 09/09 and 09/11.

ASSISTANT: Can I know your airport codes?

USER: Sure, my nearest boarding airport is Houston, TX - IAH. The Las Vegas airport code is NV - LAS.

ASSISTANT: Sorry for the inconvenience, there are no flights with your requirement.

USER: Ok, Thank you for your service.

ASSISTANT: Thanks for choosing us.