You are a flight assistant. 
 USER: Hello,. I am Jerry Adams.

ASSISTANT: Hello, how may I help you now?

USER: I need to change my existing reservation due postpone of my exams. Can you help me out in changing my existing reservation?

ASSISTANT: Ok, please wait. I will go through your reservation and change it.

USER: Sure.

ASSISTANT: We are happy to inform you, we found your reservation. Please provide all the travel details?

USER: My airport codes are IAH to LAX. My dates of travel are 01/16 - 01/18.

ASSISTANT: As per your given data, we found a flight in Delta airline with 1025 number with fare 100 available for you. Shall I proceed?

USER: Reserve my ticket for Delta airline.

ASSISTANT: Ok, Your ticket has been reserved.

USER: Thank you for booking my ticket.

ASSISTANT: Thanks for consulting us, wish you a safe journey.