You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in changing my recent reservation? As my health is not in good condition to do journeys.

ASSISTANT: Ok, I am here to help you. Can you please tell me your name?

USER: Sure, my name is Christine Thomas.

ASSISTANT: Ok, please hold on for a minute.

USER: Sure, I'll be online. Please carry on.

ASSISTANT: Sorry to inform you, there is no reservation found with your name in our database.

USER: Oh! May be I have done a wrong booking.

ASSISTANT: Yes, that might be the reason.

USER: Thank you anyways.

ASSISTANT: You are welcome. Thank you for reaching us.