You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I have reserved a flight ticket on my brother name Emily Campbell to write his exam in Los Angela but suddenly, the exam got postponed to other dates in the month of March, so can you assist me to change my brother ticket booking?

ASSISTANT: Sure, I will help you with the change of flight reservation. May I know your name please?

USER: The ticket is booked under my brother name Emily Campbell. So, please check with that name.

ASSISTANT: Ok, sure wait for a moment please.

USER: Ok, take your own time.

ASSISTANT: Emily, I have searched online and sorry to say that there is no flight reservation to cancel it.

USER: It's ok, thank you for the information.

ASSISTANT: Thanks for reaching to us.

USER: Welcome.