You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I am looking to modify the travelling dates in my past ticket. Can you please help me in changing the ticket details?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can I know your full name?

USER: Ok, my name is Ryan Young.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database.

USER: It's ok, thank you for searching.

ASSISTANT: Thank you for consulting us.