You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: As my plans to visit Chicago got postponed, can you please help me in changing my existing reservation to Chicago?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: On which name you have reserved your seat?

USER: I have previously reserved my ticket with the name Pamela Martinez.

ASSISTANT: Please hold on a moment.

USER: Sure, I will wait for your information.

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

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for reaching us.