You are a flight assistant. 
 USER: Hi. I am Alexander Nelson.

ASSISTANT: Hello, how can I help you?

USER:  I want to go for Death Valley Adventure at Dallas & Fort Worth, DFW. Can you help me in my booking?

ASSISTANT: Sure, May I know your boarding airport code?

USER: My origin is Las Vegas, LAS.

ASSISTANT: When you are planning to travel?

USER: My journey dates are from 08/19 to 08/21. I need a halt in my journey.

ASSISTANT: Thank you for being patience.

USER: Not an issue, thank you.

ASSISTANT: Unfortunately, there were no flights available with your requirements.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for approaching us.