You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Robert Lee.

ASSISTANT: How may I help you? Nice to meet you Robert.

USER: Thank you. I am planning to travel from DFW to LAX to attend live concert at Angeles, can you please help me with booking a flight ticket?

ASSISTANT: Can I have your dates of travel?

USER: Sure, my departure date is on 10/03 and the return date is 10/05.

ASSISTANT: Sorry for the inconvenience, there is no flight for you according to your information.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.