You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER:  I am Brian walker want to meet my husband at Las Vegas. Can you book a ticket on 06/19?

ASSISTANT: Sure, we will book a ticket for you for that please share your return date.

USER: I will return on 06/21.

ASSISTANT: May I know your price limit?

USER: Make sure that price  should not exceed 1000.

ASSISTANT: Ok, also provide your journey codes for further process.

USER: I  will travel from TX-DFW to NV-LAS.

ASSISTANT: Thank you for providing your details, please stand by.

USER: Ok.

ASSISTANT: Sorry no flight found matching your details.

USER: Thank you for your response.

ASSISTANT: Thank you for reaching us, have a nice day.