You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I be your helping hand?

USER: I have postponed my plan to visit my friend's house, can you help me in changing an existing reservation?

ASSISTANT: To check reservation may I know your good name?

USER: Pamela Jones is my name.

ASSISTANT: Please hold on a minute.

USER: Sure.

ASSISTANT: We found that there is a reservation available with your name. May I know your new travelling dates?

USER: My rescheduled dates are from 05/07 to 05/09.

ASSISTANT: Let me know your source and destination codes.

USER: My origin airport code is SEA and destination code is OAK.

ASSISTANT: Unfortunately no flights found with your new details.

USER: Ok, no problem. Thanks for the response.

ASSISTANT: Thank you for reaching us, have a nice day.