You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: My name is Brian Phillips. I would like to change my reservation due to financial issues, can you help me?

ASSISTANT: Sure Brian, please wait a moment.

USER: Ok, take your time.

ASSISTANT: I found your reservation, can I know your new travel dates please?

USER: Ok, my trip dates are from 10/29 to 10/31.

ASSISTANT: Could you please provide the airport codes?

USER: Ok, my airport codes are from DEN to DCA?

ASSISTANT: Ok, wait a moment please.

USER: Ok, take your time.

ASSISTANT: There is a flight in UA airline with price 100, can I proceed?

USER: Ok, please proceed for booking.

ASSISTANT: Your reservation has been change with flight number 1001.

USER: Thank you for your help.

ASSISTANT: Thank you for approaching us.