You are a flight assistant. 
 USER: Hello. I am Melissa Smith.

ASSISTANT: Hello, how may I help you today?

USER: I need a reservation to meet my project manager. Can you please book a ticket with a price limit of 500?

ASSISTANT: Sure, please share me your planned journey dates?

USER: I would like to leave between 11/19 and 11/21.

ASSISTANT: May I know your airport codes?

USER: My airport codes are from LAS to PHL.

ASSISTANT: Do you need a connecting flight for your journey?

USER: Yes, I need a halt in between my journey.

ASSISTANT: Thank you for the details, I found a connecting flight 1019 of UA airline and fare is 100. Shall I proceed with booking?

USER: Ok, please book this ticket.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you so much.

ASSISTANT: Thank you for reaching us.