You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I would like to change my flight reservation due to some emergency, can you please help me?

ASSISTANT: Sure, may I know your name to check for the availability of reservation in our records?

USER: Thank you. Myself Margaret Phillips.

ASSISTANT: Ok, please can you wait for a moment?

USER: Sure.

ASSISTANT: Ok, thank you for waiting. Sorry as per the reservation records your reservation is not available to change.

USER: Not an issue. Thank you for the information.

ASSISTANT: Thank you for choosing our agency.