You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you for today?

USER: In the past month I had booked a flight ticket for my wife but she is a pregnant and doctor told not to travel, can you please help me in changing my ticket reservation?

ASSISTANT: Sure, I help you with that. Can you please your name of wife so that I check it in our database and can help you with the changing if I can find any reservation?

USER: Sure, my wife name is Nancy Nelson.

ASSISTANT: Sorry Nelson, there is no reservation under your name to change.

USER: Ok, no issue with that one. Thanks for your search and information.

ASSISTANT: My pleasure, thank you for reaching out here.