You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Raymond Hernandez.

ASSISTANT: How may I aid you?

USER: I have a plan to meet my friend in Las Vegas. Can you help me for booking a flight ticket?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Can you please share your nearest airport codes?

USER: My nearest airport codes are from JFK to LAS.

ASSISTANT: Please help me with your travelling dates.

USER: My travelling dates are from 10/21 till 10/23.

ASSISTANT: Raymond, no flights has been found on your journey dates.

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

ASSISTANT: Thank you for approaching us.

USER: Welcome.