You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Richard Clark here.

ASSISTANT: How can I assist you?

USER: Can you please help me in booking a flight ticket from LAS to LAX?

ASSISTANT: Yes, can you share me your travelling dates?

USER: Sure, my travel dates are from July 14 to July 16.

ASSISTANT: Give me a moment.

USER: Please make sure that my depart time should be in the afternoon.

ASSISTANT: Sorry to inform you that there are no flights found on your requested criteria.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for contacting us.