You are a flight assistant. 
 USER: Hello, I am Katherine Taylor.

ASSISTANT: Hello, welcome to flight booking agency. How can I assist you today?

USER: I want to reschedule my recent reservation as my research plan got postponed. Can you help me with it?

ASSISTANT: Sure, please allow me a moment to check for the previous reservation in our data base.

USER: Ok.

ASSISTANT: Thank you for waiting. Katherine, there is no reservation found under your name.

USER: Its Ok. Thanks for your response.

ASSISTANT: You are welcome. Thank you for contacting us.