You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I render you today?

USER: I am David Taylor, I want to cancel my recent reservation because my Friend's cancelled the tour due to some issues. Can you help me with this?

ASSISTANT: Sure, I will aid you.

USER: Thank you.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: Sorry, we did not find any reservation in your name.

USER: Thanks for your response.

ASSISTANT: Thank you for availing with us. Hope to serve you again.