You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I need to change my travel dates in the past ticket because my friend gave the wrong travel dates. Can you please help me in changing the details?

ASSISTANT: Sure, I will help you. Please hold on for a moment.

USER: Thank you for accepting my request. Ok, I will wait.

ASSISTANT: May I know know your name please?

USER:  My name is Matthew Walker.

ASSISTANT: Sorry Walker, no reservation found by your name in our database.

USER: It's ok, not a problem. Thank you for searching my ticket status.

ASSISTANT: Thank you for contacting us.