You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Can you please help me to modify the travel dates in the previous ticket? Because the meeting which is planned got postponed.

ASSISTANT: Sure, can I know your name please?

USER: Thank you for considering my request.  My name is Jonathan Harris.

ASSISTANT: Sorry Harris, there is no reservation found on your name.

USER: Oh! I think the ticket is not reserved properly. Anyways thank you for searching the ticket status.

ASSISTANT: Thank you for approaching us.