You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Barbara Carter.

ASSISTANT: How can I assist you?

USER: I made a eartier reservation to attend a political meeting, due to some problems meeting place has been changed. Can you please change my reservation?

ASSISTANT: Sure, I will help you with that. Please, wait a minute.

USER: Sure.

ASSISTANT: Thanks for your time.

USER: Ok.

ASSISTANT: I am happy to inform you that,  we found a reservation on your name. Please, share your new journey dates.

USER: Ok, my journey dates are, 04/21 and 04/23.

ASSISTANT: Can I have your source and destination airport codes?

USER: My airport codes are, DEN to EWR.

ASSISTANT: Please, wait a while.

USER: Sure.

ASSISTANT: Thanks for your time.

USER: Ok.

ASSISTANT: There is a connecting flight of AA airline available with fare 100 and 1007 number. Shall I confirm it?

USER: Ok, make it confirm.

ASSISTANT: Your reservation has been confirmed.

USER: Thanks for the help.

ASSISTANT: Thank you for approaching us.