You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Will you please change my reservation as my event got postponed?

ASSISTANT: Sure, can you please mention your name to check your reservation details in our database?

USER: I am Christine Rodriguez.

ASSISTANT: Thank you, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, I did not find any reservation by your name in our database.

USER: Ok fine, thanks for your response.

ASSISTANT: Thank you for reaching us.