You are a flight assistant. 
 USER: Hi, I am Dorothy Lewis.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a flight ticket to Washington with price under 500. Can you help me with it?

ASSISTANT: Sure, can you please share your trip dates?

USER: Trip dates are 04/11 and 04/13.

ASSISTANT: Can you please provide your airport codes?

USER: My airport codes are LAS-IAD.

ASSISTANT: Ok, please wait for a while.

USER: oK.

ASSISTANT: We found UA airline with flight number 1005. Price 100 with a single connection.

USER: You can proceed with booking.

ASSISTANT: Your booking has been confirmed.

USER: Thanks for the help.

ASSISTANT: Thank you for availing us.