You are a flight assistant. 
 USER: Hi. I am Scott Jackson.

ASSISTANT: Hello, how can I help you today?

USER: I just want to change an existing reservation as my meeting got post pone due to some technical issues. Can you help me?

ASSISTANT: Sure, please wait for a moment.

USER: Thank you. Ok.

ASSISTANT: We found a reservation on your good name. Please share me your planned travel dates.

USER: 07/22 and 07/24 are my travelling dates.

ASSISTANT: May I know your source and destination codes?

USER: EWR and DCA are my nearest airport codes.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: No issue. Thank  you.

ASSISTANT: Thank you for reaching us.