You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Amanda Hall.

ASSISTANT: How can I help you?

USER: Is this Flight Booking Agency?

ASSISTANT: Yes, you have approached to a right place.

USER: If I change my resent reservation, you will charge any penalty?

ASSISTANT: Yes, there is a charge of 200 on your flight fare.

USER: It's ok, please help me to change my recent reservation. If you find my ticket?

ASSISTANT: Sure, I will help you with it.

USER: Ok.

ASSISTANT: Sorry, there are no previous reservation with your details.

USER: Which means I have saved my money, it's ok. thank you for the information.

ASSISTANT: You are welcome.