You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. I hope you are good today, how can I help you?

USER: I'm Katherine Gonzalez. I want to change my reservation due to financial issues.

ASSISTANT: Sure, I will help you. Wait a while.

USER: Ok, take your time.

ASSISTANT: There is a reservation on your name, please share your desired travel dates.

USER: Sure, my itinerary dates are 04/07 to 04/09.

ASSISTANT: Can I know your airport codes please?

USER: My airport codes are OAK and PHL. I need a direct flight.

ASSISTANT: There is a flight with connection limit 1 and fare 100, shall I proceed for booking? Sorry, there is no reservation on your desired travel dates.

USER: Ok, no problem. Thank you for your help.

ASSISTANT: Thank you for opting us.