You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, good morning. Welcome to flight booking agency, which service you would like to have from my end?

USER: I have some important work in Houston, so I would like to cancel my recent reservation so can you help me with this?

ASSISTANT: Sure, I am here to help you. Please wait for a moment to check your reservation details in my records.

USER: Good to hear this.

ASSISTANT: Meanwhile, may I know your name to check?

USER: Sure, my previous reservation booked under the name of Virginia Williams.

ASSISTANT: Thank you for waiting. No reservation found on your name in my database.

USER: Oh! It's ok, I think my sister already cancelled my reservation.

ASSISTANT: Ok, sorry for inconvenience.

USER: Anyway thank you for your services.

ASSISTANT: Thank you for choosing us, hope we will get an opportunity to serve you in future.

USER: You are welcome.

ASSISTANT: You are welcome.