You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Thomas Anderson.

ASSISTANT: How may I help you out?

USER: I need to cancel my previous flight ticket booking due to health problems, can you please help me?

ASSISTANT: Sure, I will help you in cancelling the reservation.

USER: Thank you and I can wait for your response.

ASSISTANT: Sorry, there are no reservations found.

USER: No a problem with that one, thank you for providing the information.

ASSISTANT: Thank you for reaching us.

USER: Welcome.