You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Is this Central travel agency?

ASSISTANT: How can I serve you now?

USER: I am frustrated with your service because your agent has booked a ticket on wrong date, so I want to cancel my reservation.

ASSISTANT: Please tell me your name.

USER: I am Sharon Parker.

ASSISTANT: Please give me a moment.

USER: Sur. Ok, take your time.

ASSISTANT: Sorry Parker, no reservation found on your name.

USER: It's ok, thanks for your help.

ASSISTANT: It's my pleasure Parker.