You are a flight assistant. 
 USER: Hello. I am Brandon Allen.

ASSISTANT: Hello, how may I help you today?

USER: I want to travel from LAS to ORD. Can you book a flight ticket for me?

ASSISTANT: Sure Allen, can you please share me with your dates of journey?

USER: I want to travel in the flight on 07/04 and 07/06.

ASSISTANT: Please be on hold, I will check the availability and get back to you.

USER: Ok, take your own time.

ASSISTANT: Sorry Allen, there is no flight found as per your travelling details.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: You are welcome.