You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Helen Garcia.

ASSISTANT: Helen, how can I assist you?

USER: As the event I am going to attend at Dallas got cancelled, can you please help me by cancelling my recent reservation?

ASSISTANT: Sure, please give me a moment to check your ticket status.

USER: Sure, take your own time.

ASSISTANT: I found your reservation and cancelled it.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.