You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Michael Allen here.

ASSISTANT: How may I assist you?

USER: My doctor suggested me to avoid travelling. So, can you help me with cancellation?

ASSISTANT: Sure, I will help you.

USER: Thank you.

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

USER: Sure.

ASSISTANT: Michael Allen, 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 choosing us.

USER: You are most welcome.