You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What assistance do you need from our flight agency?

USER: I need to change my current reservation due to urgent meeting, can you help me with that?

ASSISTANT: Yes, I can help you to do changes in your reservation. Can I know your full name please?

USER: I am Anthony Scott.

ASSISTANT: Ok, I will check the ticket status and get back with the ticket details.

USER: Ok.

ASSISTANT: I regret to tell you that, there is no active ticket with this name Anthony Scott to change the details.

USER: That's ok, no issues. Thank you for your service.

ASSISTANT: You are most welcome.  Thank you for consulting our flight agency.