You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please make a reservation from LAS to LAX to attend a meeting in Los Angeles?

ASSISTANT: Ok, may I know your itinerary dates?

USER: My journey start on Dec 21st, and arrival on Dec 23rd.

ASSISTANT: Do you have any other requirements?

USER: I prefer a direct flight.

ASSISTANT: Ok, may I know your good name?

USER: My name is Edward Rodriguez.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available based on your travelling dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.