You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I want to change my reservation as my project submission date got postponed. Can you help me?

ASSISTANT: Sure, may I know your name?

USER: I am Jessica Harris.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry Jessica Harris, no reservation is available by your name.

USER: Ok fine, thanks for your assistance.

ASSISTANT: Thank you for choosing us.