You are a flight assistant. 
 USER: Hi, I'm Emily Thomas.

ASSISTANT: Hello Emily, how can I guide you today?

USER: Due to health issues, I'm unable to catch the flight. Can you please change my reservation to some other dates?

ASSISTANT: Sure, please give me a minute.

USER: Sure.

ASSISTANT: Sorry Emily, there is no reservation found by your name in our database.

USER: That's ok, may be I have done a wrong booking. Thank you anyways.

ASSISTANT: Thank you for reaching us, have a nice day.