You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Melissa Wilson. My exam got cancelled in this week. Can you help me to cancel my flight ticket?

ASSISTANT: Sure, I can help you with that.

USER: I am happy to hear that from you.

ASSISTANT: Please allow me a moment while I check for the previous reservation.

USER: Please check my details.

ASSISTANT: Your patience is greatly appreciated. Melissa, there is no reservation found under your name.

USER: Oh! ok. Thank you for your time.

ASSISTANT: You are welcome. Thank you for contacting us.