You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I want to cancel my recent reservation due to my joining got cancelled.

ASSISTANT: Sure, I will help you with that. For that I need your name to check reservation details?

USER: I am Ashley Walker.

ASSISTANT: Sorry Walker, I cannot find any reservation with your name.

USER: Not a problem.

ASSISTANT: Do you want any more information from us?

USER: No. Thank you for your service.

ASSISTANT: It's my pleasure.