You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Gary Carter.

ASSISTANT: How can I assist you Gary Carter?

USER: I am unable to travel at this moment due to climate issues, so can you help me cancelling my recent reservation?

ASSISTANT: Sure, I will help you with this.

USER: Thank you.

ASSISTANT: Wait a moment please, let me check the database and get back to you.

USER: Ok, I will wait for your reply.

ASSISTANT: There is no active reservation found with your name in our database.

USER: Oh! I think my sister's already cancelled my reservation, anyway thank you for your services.

ASSISTANT: Thank you for contacting us.