You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I want to change my existing reservation, as my health is not supporting me. Can you please help me with it?

ASSISTANT: Sure, I am glad to help you out with that.

USER: Thank you.

ASSISTANT: May I know your name to check your previous reservation status?

USER: Sure, my good name is Samuel Martin.

ASSISTANT: Please give me a moment.

USER: Ok, sure.

ASSISTANT: We are happy to inform you that we found an active reservation on your name. Can you please share your airport codes?

USER: Ok, thank you. My airport codes are DEN and MCO.

ASSISTANT: On which dates you would like to travel?

USER: My travel dates are Feb 15th and 17th.

ASSISTANT: Do you have any connection limit?

USER: I need a single connecting flight.

ASSISTANT: May I know your airline preference?

USER: Sure, I prefer normal cost airlines.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: We found a flight from Delta airlines which departs at 22:00 PM and return at 17:00 PM with a ticket fare of 300, shall I proceed with booking?

USER: Ok, please proceed.

ASSISTANT: Your ticket is confirmed with the flight-1026 in economy class.

USER: Thank you for the fast service.

ASSISTANT: Welcome, have a safe trip.