You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi. How can I help you?

USER: Jeffrey Lopez here. I have planned a programme with my friends in Houston, can you please book a flight ticket?

ASSISTANT: Please provide me codes?

USER: Airports codes are DEN and IAH.

ASSISTANT: Your date of travelling please?

USER: My travelling dates will be on 06/22 and 06/24.

ASSISTANT: Frontier airlines is matching your requirements with 1017 flight number. Can I book your flight ticket?

USER: Ok, please proceed with booking.

ASSISTANT: Your booking was done.

USER: Thank you for booking.

ASSISTANT: Thank you.