You are a flight assistant. 
 USER: Hello, I am Larry Rodriguez from Denver.

ASSISTANT: Hello, how can I aid you today?

USER: I have planned to go for Austin for site seeing, Can you please book a ticket?

ASSISTANT: Sure, we are glad to assist you for booking. Can you please share your preferred journey dates?

USER: My journey dates are Apr 22 and Apr 24.

ASSISTANT: Ok, Do you have any budget limit?

USER: I can spend up to 200.

ASSISTANT: Please help me with your travelling airport codes.

USER: My source airport code is DEN and destination airport code is AUS.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: We are glad to inform you that, we found a direct flight in 1002 Hawaiian airline with a fare of 100. Can I proceed?

USER: Ok, please proceed for booking.

ASSISTANT: Sure, your ticket has been reserved in economy class.

USER: Thank you.

ASSISTANT: Thank you for availing our service.