You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Debra Edwards here.

ASSISTANT: Debra, how can I assist you today?

USER: I am planning to go for a change to Bayou Bend Collection and Gardens which is in Houston, please book a flight ticket from AUS to IAH.

ASSISTANT: Sure, I will help you for booking your ticket. Please provide us your trip dates.

USER: My planning dates are from 04/25 to 04/27.

ASSISTANT: There is a flight available with Spirit airlines. Shall I proceed for booking your ticket?

USER: Please proceed with the booking.

ASSISTANT: Your ticket is confirmed successfully with the flight number 1007.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us, have a safe journey.