You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I aid you?

USER: I want to book a flight ticket,will you please let me know regarding availability of tickets?

ASSISTANT: Sure, I will help you.

USER: My journey starts from EWR to LAS.

ASSISTANT: Ok, please let me know your your journey dates?

USER: My travelling dates are 03/26 and 03/28.

ASSISTANT: Do you have any connection limit?

USER: No,I want direct flight.

ASSISTANT: Please give me some time I will check and get back to you.

USER: OK.

ASSISTANT: Thanks for waiting, Unfortunately there are no flights found with your requested dates.

USER: It's OK.

ASSISTANT: May I know your name for documentation purpose?

USER: Thank you for sharing information. My name is Dennis Turner.

ASSISTANT: Thanks for opting us, have a nice day.