You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I would like to change my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure, please mention your name to check your reservation details.

USER: I am Ryan Jones.

ASSISTANT: Thank you. Please be online for a while. I will check your reservation status and get back to you.

USER: Sure.

ASSISTANT: I am sorry to say you that there is no reservation found under your name in our database.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.