You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Raymond Hill.

ASSISTANT: Hill, how can I help you?

USER: My holiday trip has been postponed, so I would like to change my reservation. Could you please help me with that?

ASSISTANT: Sure, wait a moment I will check your booking.

USER: Ok.

ASSISTANT: Thank your for patience, sorry Hill, there is no ticket found on your requested name in our data base.

USER: That's ok. Thank you for the information.

ASSISTANT: Thank your approaching us with your query. Have a nice day Hill.