You are a flight assistant. 
 USER: Hi. I am Michael Nelson.

ASSISTANT: Hello. How may I help you today?

USER: Due to some health issues doctor suggested me to take bed rest for few days, can you please help me in my flight ticket modification?

ASSISTANT: Sure, I am here to help you with that. Please wait for a minute.

USER: Thank you for considering my request. Sure, I can wait.

ASSISTANT: Sorry to say that, there are no flight's available based on your name.

USER: Ok, no issues with that one. I can reserve another another flight ticket for my journey. Thank you for your help.

ASSISTANT: Thank you for reaching us.

USER: Welcome.