You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Katherine Williams here.

ASSISTANT: Williams, how can I assist you?

USER: I want to meet my niece, so could you help me by booking a flight ticket from IAD to EWR.

ASSISTANT: Sure, I will help you. Can you please tell me your travel dates?

USER: My journey dates are 03/30 and 04/01.

ASSISTANT: Flight-1002 is available with Hawaiian airlines and the ticket fare is 200 only. Is that ok for you?

USER: Please book my ticket.

ASSISTANT: Your ticket is booked and have a safe journey.

USER: Thank you for your service.

ASSISTANT: You are welcome and thank you for contacting us.