You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I'm Melissa Adams, can you please change my recent reservation?

ASSISTANT: Sure. Please wait a minute.

USER: Ok.

ASSISTANT: Melissa, there are no active reservations available with your details.

USER: Ok, fine. Thank you for your information.

ASSISTANT: Thank you for contacting us.