You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I made a reservation earlier with my family to attend a trip to Boston but due to some bad health issues it has been postponed. Can you help me in changing my reservation?

ASSISTANT: Sure, may I know your name please?

USER: Thank you. I am Kathleen Campbell.

ASSISTANT: Sorry, there was no reservation found with your given name.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us.