You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I am Melissa Turner.

ASSISTANT: Hello Melissa.

USER: Due to health problems I need to cancel my reservation, can you help me please?

ASSISTANT: Sure, Wait a Minute I will check and let you now.

USER: Ok.

ASSISTANT: Sorry to tell that there is no reservation found on your name.

USER: Thanks for your information.

ASSISTANT:  Thank you for approaching us.