You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you now?

USER: I am Samuel Davis, I already booked a ticket but fare is expensive for me, please change my reservation so I get a flight under fare of 200? Can you help with that?

ASSISTANT: Sure, we are kindly help you. Please wait a minute, I will check and let you know the status of the reservation.

USER: Sure.

ASSISTANT: Thank you for being patient, no reservation matches with the given name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for availing with us.