You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I serve you today?

USER: I want to cancel my recent reservation due to sudden change in my trip dates. Can you help me with that?

ASSISTANT: Sure, we are here to aid you, please provide your name.

USER: Thank you. Gary Hall here.

ASSISTANT: Please, wait for while.

USER: Sure.

ASSISTANT: Thanks for your time, there is no reservation found on your name Gary Hall in our data base.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.