You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am James Williams.

ASSISTANT: How can I render you today?

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

ASSISTANT: Sure, we are here to aid you.

USER: Thank you.

ASSISTANT: Give, me a minute I will check the reservation and revert to you.

USER: Sure.

ASSISTANT: Thanks for your time, there is no reservation found on your name James Williams in our database.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for availing us.