You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Rebecca King want to attend a workshop at Houston, can you book a ticket within the fare of 200?

ASSISTANT: Sure, do you have any planned dates?

USER: Yes, my planned dates are 04/13 and 04/15.

ASSISTANT: Could you help me with your airport codes?

USER: Sure, I want to travel from DEN to IAH.

ASSISTANT: Thank you, please wait for a moment.

USER: Ok.

ASSISTANT: Flight-1022 of Hawaiian airline is available for you. Shall I proceed?

USER: Yes, proceed with my booking.

ASSISTANT: Your ticket has been confirmed, have a nice journey.

USER: Thank you.

ASSISTANT: Welcome.