You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kathleen Lewis from Denver.

ASSISTANT: How may I help you?

USER: I would like to visit Houston Zoo with my friends. Please help me in booking a ticket.

ASSISTANT: Sure, please provide your airport codes.

USER: The respective airport codes are DEN and IAH.

ASSISTANT: Can I have your trip dates please?

USER: The journey dates are 05/24 and 05/26.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for your waiting, I found a flight for you in Spirit airlines with price 100. Can I proceed?

USER: Yes, please book my ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1025.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.