You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you for the day?

USER: My name is Mary Collins. I would like to travel from EWR to JFK, could you help me out?

ASSISTANT: Sure, I am here to help you with this. May I know your travelling dates, please?

USER: My preferable dates are from 10/25 to 10/27.

ASSISTANT: Sorry to tell you that, there are no flights available as per your travel dates.

USER: That's ok.

ASSISTANT: You are welcome, thank you for approaching us.

USER: Thank you for your time.

ASSISTANT: Have a great day.