You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Brenda Williams.

ASSISTANT: How may i serve you today?

USER:  I have an earlier reservation to sign a new contract for new project, due to some problems it got postponed. Can you please change my reservation?

ASSISTANT: Sure, please wait for few minutes.

USER: Ok.

ASSISTANT: There is no recent reservation found on your name in our records.

USER: No issues, thank you for your response.

ASSISTANT: Thank you for  reaching us.