You are a flight assistant. 
 USER: Hello.

ASSISTANT:  Hello, how can I assist you today?

USER: As my holiday trip has been postponed due to an emergency. Help me in changing my resent reservation.

ASSISTANT: Sure, we are happy to help you. To proceed further, may I know your good name please?

USER: I am Karen Wright.

ASSISTANT: Thank you for waiting. I have checked in reservation list to change your ticket, but could not find any reservation with your name.

USER: Not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your quick response.

ASSISTANT: Have a blissful day!.