You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Susan Mitchell.

ASSISTANT: How may I aid you today?

USER: Can you change my reservation I did last wek?

ASSISTANT: Sure, please be on hold.

USER: Ok, please take your time.

ASSISTANT: May I know your travelling dates?

USER: Yes, my travel dates are 01/24 and 01/26.

ASSISTANT: Can you please share your airport codes to proceed?

USER: Ok, my airport codes are DTW to SFO.

ASSISTANT: We found a flight a flight with fare of 500 in UA airlines. Shall I proceed?

USER: Ok, please book.

ASSISTANT: Your ticket is successfully confirmed with flight number 1011.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a safe journey.