You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Myself Susan Rodriguez. I would like to change my recent reservation due to some personal issues, will you help me with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you for accepting my request.

ASSISTANT: Wait for some time.

USER: Ok, I will wait for your response.

ASSISTANT: Thanks for waiting we found reservation on your name. Can you share me your travelling dates?

USER: My travelling dates are June 22 and June 24.

ASSISTANT: May I know your source point and destination point?

USER: My airport codes are DCA o DEN.

ASSISTANT: Ok, wait for some time.

USER: Ok, I will wait for some time.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: Ok,  not an issue.

ASSISTANT: Thanks for approaching us.

USER: Thank you for your information.