You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What type of service do you need from our travel agency?

USER: I want to change my existing reservation due to some health issues, can you help me with that?

ASSISTANT: Yes, I can help you to change the ticket details once I have found your previous ticket.

USER: Thank you.

ASSISTANT: May I have your name please? So that, I can check the ticket status.

USER: My name is Virginia Clark.

ASSISTANT: Ok, I will check the status and get back to you.

USER: Ok.

ASSISTANT: Sorry for the inconvenience, when I have checked the status in our portal, I haven't found any reservation under your name.

USER: No issues, thank you for the checking.

ASSISTANT: That's my pleasure, thank you for approaching us.