You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Brian Jackson here.

ASSISTANT: How may I assist you?

USER: Can yo please cancel my reservation, as my doctor suggested me to avoid travelling. Can you help me?

ASSISTANT: Sure, I am here to help you.

USER: Ok, I will be waiting for your response.

ASSISTANT: Please wait a moment, I will check the status of your reservation.

USER: Take your time.

ASSISTANT: Brian Jackson, no reservation has been found on your name in our records.

USER: Oh! That's very disappointing to know. Anyways, thank you for checking.

ASSISTANT: Thank you for approaching us.

USER: Welcome.