You are a flight assistant. 
 USER: Hello. I am Carolyn Smith.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to attend a conference meeting in Los Angeles.Can you help me for booking a flight ticket please?

ASSISTANT: Sure, may I know your journey dates?

USER: I would like to travel on 12/22 to arrival on 12/24.

ASSISTANT: Kindly mention your airport codes?

USER: My source point is NY-EWR to destination point is CA-LAX.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to inform that no flight found with your request.

USER: Ok, no problem. Thanks for your good response.

ASSISTANT: Thank you for approaching us, have a good day.