You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Gregory Rodriguez. I want to change my reservation, Can you modify my reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Wait for a while I will check the reservations on your name and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting we found reservations on your name. Can you share me your travelling dates to book a flight?

USER: Travelling dates are on 08/27 and 08/29.

ASSISTANT: Let me know your preferable airport codes?

USER: Airport codes are from SFO to PHL.

ASSISTANT: Ok, wait for a while.

USER: Sure.

ASSISTANT: We found UA airline with connecting flight and number 1029 fare of 200. Shall I confirm it?

USER: You can proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thanks for approaching us.