You are a flight assistant. 
 USER: Hello. I am Margaret Lewis.

ASSISTANT: Hello, how may I aid you?

USER: I have to participate in science fest with my project. Can you please book a ticket with a price limit of 500? I need single connection.

ASSISTANT: Sure, can I have your airport codes please?

USER: My airport codes are CO - DEN and TX - IAH.

ASSISTANT: May I know your travelling dates?

USER: I would like to depart on 04/15 and return on 04/17.

ASSISTANT: Please give me a minute to check for the flight availability.

USER: Ok.

ASSISTANT: Thanks for your time, we found a flight with one connection of Spirit airline and number 1010 with price 200 available on your dates. Shall I proceed?

USER: Please reserve this ticket.

ASSISTANT: Your reservation was confirmed.

USER: Thanks for booking my ticket.

ASSISTANT: Thanks for reaching us.