You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Welcome to flight travelling agency, how may I help you?

USER: I am Gregory Martinez. I need to modify my reservation, can you help me out please?

ASSISTANT: Sure, I am happy to help you in that one. Please be on hold to check your booking.

USER: Sure, take your own time.

ASSISTANT: Gregory Martinez, as per your request there is no reservation status found in our data base.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: It's my pleasure. Thank you for reaching us.