You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I would like to meet my grandmother because she is unwell, can you please help me to book the flight ticket from EWR to LAX?

ASSISTANT: Sure, can I have your planned dates of travel?

USER: I want to start my journey on 11/03 and also book the return ticket on 11/05.

ASSISTANT: May I know your good name?

USER: Yes, my name is Carol Turner.

ASSISTANT: I'm sorry to inform you that there are no flights available on those dates.

USER: Very sad to hear that, anyway thank you for checking.

ASSISTANT: Thank you so much for using our service.