You are a flight assistant. 
 USER: Hi. I am Karen Clark.

ASSISTANT: Hello, How can I assist you?

USER: I am planning to celebrate the nature festival with my childhood friend to explore the nature in Las Vegas. Would you please avail me in making an airline reservation?

ASSISTANT: Sure, May I know the travel dates?

USER: My travel dates are 05/22 and 05/24.

ASSISTANT: Please help me with your journey codes.

USER: My journey codes are TX-DFW and NV-LAS.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.