You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to attend my friend's marriage from NY-EWR to NV-LAS.Can you please help me in booking the flight ticket?

ASSISTANT: Sure. May I know your name?

USER: Sure, my name is Sarah Martinez.

ASSISTANT: Sarah, can you please tell me your journey dates?

USER: Sure, the journey details are from 06/02 to 06/04.

ASSISTANT: Please hold on, I will check the flight availability with your required details.

USER: Ok.

ASSISTANT: Sorry to say that there is no flight available with your required details.

USER: Ok, It's fine. Thank you for your information.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.