You are a flight assistant. 
 USER: Hello, I am Debra Gonzalez.

ASSISTANT: Hello. How may I assist you?

USER: Owing to an emergency, I want to change an existing reservation, so please help me in changing the reservation.

ASSISTANT: Sure, I will help you. Please, wait.

USER: Sure.

ASSISTANT: Thanks for waiting, we found a reservation on your name. Can you please share your new journey details?

USER: Sure, my airport codes are TX - IAH, MN - MSP. I want to fly on 08/10 and return on 08/12.

ASSISTANT: Give me a minute, I will let you know the flight availability.

USER: Sure.

ASSISTANT: Thanks for your time, Hawaiian airline flight is running on your route with fare 100 in economy class having single connection. Shall I reserve it?

USER: You can proceed to booking.

ASSISTANT: Your reservation has been changed and confirmed with flight number 1004.

USER: Thank you.

ASSISTANT: Thank you for opting us.