You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Jeffery Thomas. Can you please help me in booking my flight ticket from LAX to LAS?

ASSISTANT: Sure, may I know your trip dates please?

USER: My trip dates are Apr 30 and May 02.

ASSISTANT: Please wait.

USER: Ok, sure.

ASSISTANT: Thanks for waiting and sorry to inform you that there is no flight available as per your request.

USER: Ok, fine thank you for reaching us. Thank you for your help.

ASSISTANT: Most welcome.