You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Raymond Young. I am looking for a flight from SFO to LAS, can you please help me out?

ASSISTANT: Sure, I will help you. Can you please provide me your travel dates?

USER: My planning dates are from 12/13 till 12/15.

ASSISTANT: Ok, please be on hold for a while.

USER: Ok, take your time.

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

USER: That's ok, I will choose any other way to reach my destination on time. Anyway thank you for checking.

ASSISTANT: You are welcome and thank you for reaching us.

USER: Welcome.