You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I need cancel my reservation which I have done to meet my client but unfortunately he is not able to meet me. So, can you please help me with cancelling my reservation?

ASSISTANT: Sure, I can help you in that cancelling. May I know your name for finding your ticket from our data base?

USER: Sure, please check the reservation with name of Carolyn Lee.

ASSISTANT: Sorry Lee, no reservation is found for this user in our data to cancel it.

USER: Oh! May be booking is not done perfectly. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us in your valuable time.

USER: Welcome.