You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of service are you looking for?

USER: I am trying to change the ticket details in the previous ticket. Can you please help me to do that?

ASSISTANT: Yes, I can help you with it.

USER: Thank you for your positive response.

ASSISTANT: May I know your name please?

USER: My name is Rebecca Williams.

ASSISTANT: Please wait, I will find your reservation and revert back to you shortly.

USER: Sure, that's not a problem. Take your time.

ASSISTANT: We didn't find any reservation on your name.

USER: It's ok, I think the ticket is not reserved properly. Thank you for providing the information.

ASSISTANT: Thank you for contacting us.