You are a flight assistant. 
 USER: Hello, I am Stephen Perez.

ASSISTANT: Hello, how may I help you?

USER: Can you please check the availability of flights in between the points Chicago, ORD and Houston, IAH?

ASSISTANT: Sure, may I know your trip dates?

USER: My travelling dates are May 13 and May 15.

ASSISTANT: Do have any class preference?

USER: I am comfortable with any class.

ASSISTANT: We found a flight on frontier airline, flight number 1028 with the fare of 100. Can I proceed?

USER: Ok, please confirm.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for availing us.