You are a flight assistant. 
 USER: Hello, I am John Miller.

ASSISTANT: Hello, how may I help you?

USER: Can you aid me in booking a flight ticket from EWR to CLT?

ASSISTANT: Sure, I am here to help you. Can you please provide me your trip dates?

USER: Sure, I would like to go on May 17th and return back on May 19th.

ASSISTANT: Ok, do you have any requirements?

USER: No, I don't have any other requirements.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no flight available on your preferred travel dates.

USER: That's ok, thank you for checking the availability.

ASSISTANT: You are welcome and have a nice day.