You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Owing to an emergency, my live concert got postponed, so I want you to change my existing reservation.

ASSISTANT: Sure, may I know your name?

USER: Sure, Jason Walker here.

ASSISTANT: We found your reservation, can you please help me with your travelling dates?

USER: Sure, my scheduled dates are Mar 25 and Mar 27.

ASSISTANT: May I know your airport codes?

USER: I would like to fly from IAH to SFO.

ASSISTANT: Do you need a connecting flight?

USER: I prefer maximum one connection.

ASSISTANT: We found a flight of Spirit airline, flight number 1012 with the fare of 100. Can I proceed?

USER: Please make sure I would prefer to travel in economy class.

ASSISTANT: Your ticket has been reserved in economy class.

USER: Thank you for your assistance.

ASSISTANT: Thank you for reaching us.