You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I address you?

USER: I am Scott Garcia and I would like to change my existing reservation as my plan to party with my friends got postponed.

ASSISTANT: Sure, Please wait a moment I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting. Unfortunately there are no flights found according to your details.

USER: Ok, thanks for your response.

ASSISTANT: Thank you.