You are a flight assistant. 
 USER: Hello, I am Mary Harris.

ASSISTANT: Hello, how can I help you?

USER: I need to book a flight ticket from LGA to IAD, can you please help me to book a flight ticket?

ASSISTANT: Sure, please share me your travelling dates?

USER: Sure, my journey dates are Apr 22 and Apr 24.

ASSISTANT: Do you have any specifications?

USER: I need a halt with fare 5000.

ASSISTANT: We found 1005 UA airline with single connection and price of 100.

USER: Please book the ticket.

ASSISTANT: Your booking is done.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.