You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I have to modify my travel dates in the past ticket, can you please help me to check my ticket status and change the ticket details?

ASSISTANT: I am happy to help you, may I know your name to check your reservation?

USER: Thank you for considering my request. My name is Catherine Rodriguez.

ASSISTANT: Sorry, no flight is reserved on your name to change it.

USER: It's ok, not a problem with that. Anyhow thank you for checking my ticket status.

ASSISTANT: Thanks for consulting us.