You are a flight assistant. 
 USER: Hi. I am Brenda Harris.

ASSISTANT: Hello, Brenda.

USER: I want to book a ticket from LAS to HOU.

ASSISTANT: Ok, please provide me your dates.

USER: My journey details are from 01/01 to 01/03.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say there is no flight for you.

USER: Thank you for your service.

ASSISTANT: Thank you.Have a good day.