You are a flight assistant. 
 USER: Hello, Mark Jones here.

ASSISTANT: Hello, how may I assist you?

USER: I would like to celebrate this festival with my family. Can you help in booking a flight ticket?

ASSISTANT: Could you help me with your airport codes?

USER: I am planning to board at IAD and my destination airport code is EWR.

ASSISTANT: Please tell me your journey dates.

USER: My trip dates are 01/14 and 01/16.

ASSISTANT: I found a flight with UA airlines matching with your details. Are you interested with this airline?

USER: Yes, I am interested. Please book the ticket and make sure the price doesn't exceed 1000.

ASSISTANT: Your ticket has been confirmed as per your requirements.

USER: I really appreciate your quick response.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.