You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I render you?

USER: As my manager did not approved my leave, can you help me to cancel my recent reservation?

ASSISTANT: Sure, may I know your good name?

USER: I am Helen Thomas.

ASSISTANT: We found a reservation on your name. Shall I cancel it?

USER: Ok, please cancel it.

ASSISTANT: Your reservation has been cancelled.

USER: Thanks for your assistance.

ASSISTANT: Thank you for reaching us.