You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Sharon Martin here. I want to travel from LAS to LGA. Can you please help me for book a flight ticket?

ASSISTANT: Yes, I can help you. May I know you travelling journey dates?

USER: My departure date is 05/14 and return date is 05/16.

ASSISTANT: Please wait for a moment.

USER: Ok, I will wait.

ASSISTANT: There are no flights available on the trip dates to your location.

USER: Thank you for the information.

ASSISTANT: Sorry for the trouble. You are most welcome.