You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: My name is Jeffrey Garcia. I want to travel from LAS to ORD to attend a conference meeting. Will you please help me in booking my ticket?

ASSISTANT: Surely, I will help you. Can I have your journey dates please?

USER: Sure, I probably planned my trip dates to depart on 01/14 and return back on 01/16.

ASSISTANT: Can I have a moment please? I will check the availability of the flights.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: That's fine.

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

USER: Thank you for your time.

ASSISTANT: You are welcome.