You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Ronald Phillips.

ASSISTANT: How may I guide you today?

USER: Can you find a flight for me from DFW to LAS?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: Ok, my trip dates are from 02/19 and 02/21.

ASSISTANT: I am sorry to say that there is no flight found under your  detail.

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

ASSISTANT: Thank you for reaching us.